Knowledge (XXG)

Epicycloid

Source 📝

2301: 1613: 1512: 1563: 1546: 1529: 1491: 1470: 1447: 1424: 337: 541: 2290: 2133: 141: 348: 2139: 1982: 651: 332:{\displaystyle {\begin{aligned}&x(\theta )=(R+r)\cos \theta \ -r\cos \left({\frac {R+r}{r}}\theta \right)\\&y(\theta )=(R+r)\sin \theta \ -r\sin \left({\frac {R+r}{r}}\theta \right)\end{aligned}}} 353: 146: 1360: 1950: 1005: 891: 536:{\displaystyle {\begin{aligned}&x(\theta )=r(k+1)\cos \theta -r\cos \left((k+1)\theta \right)\\&y(\theta )=r(k+1)\sin \theta -r\sin \left((k+1)\theta \right).\end{aligned}}} 1744: 1828: 1786: 1867: 1284: 702: 939: 1911: 1891: 1698: 1658: 1096: 1249: 129: 1411: 750: 1974: 1678: 1638: 1386: 1304: 1212: 1120: 1058: 1028: 819: 799: 779: 724: 100: 2285:{\displaystyle y=\left(R+r\right)\sin \theta -r\sin \left(\theta +\alpha \right)=\left(R+r\right)\sin \theta -r\sin \left({\frac {R+r}{r}}\theta \right)} 2128:{\displaystyle x=\left(R+r\right)\cos \theta -r\cos \left(\theta +\alpha \right)=\left(R+r\right)\cos \theta -r\cos \left({\frac {R+r}{r}}\theta \right)} 2509: 552: 20: 2397: 2492: 2414: 1312: 2550: 2317: 1919: 2545: 947: 2514: 827: 1709: 1490: 2332: 1797: 1755: 1601: 63: 1840: 1469: 1257: 1099: 132: 1511: 1446: 1423: 2500: 1562: 1545: 1528: 663: 2530: 1034: 897: 2504: 2470: 2393: 2389: 2382: 2337: 1215: 1896: 1876: 1683: 1643: 2362: 68: 2300: 1067: 19: 1225: 1061: 105: 1393: 732: 1959: 1663: 1623: 1612: 1371: 1289: 1197: 1105: 1043: 1013: 804: 784: 764: 709: 85: 2435: 2539: 2357: 74:
An epicycloid with a minor radius (R2) of 0 is a circle. This is a degenerate form.
2352: 2520: 1749:
By the definition of angle (which is the rate arc over radius), then we have that
2488: 2473: 2347: 2342: 1579: 67:—which rolls without slipping around a fixed circle. It is a particular kind of 54: 2531:
Historical note on the application of the epicycloid to the form of Gear Teeth
2367: 2425:
Epicycloids and Blaschke products by Chunlei Cao, Alastair Fletcher, Zhuan Ye
2478: 1219: 646:{\displaystyle z(\theta )=r\left((k+1)e^{i\theta }-e^{i(k+1)\theta }\right)} 2327: 2309: 1590: 1586: 1460: 1437: 57:
produced by tracing the path of a chosen point on the circumference of a
42: 2525: 2448: 2322: 2305: 1597: 16:
Plane curve traced by a point on a circle rolled around another circle
58: 1703:
Since there is no sliding between the two cycles, then we have that
546:
This can be written in a more concise form using complex numbers as
2424: 2299: 1611: 23:
The red curve is an epicycloid traced as the small circle (radius
1700:
is the angle from the starting point to the tangential point.
1222:
of the space between the larger circle and a circle of radius
761:(Assuming the initial point lies on the larger circle.) When 1660:
is the angle from the tangential point to the moving point
1030:
is a positive integer, then the curve is closed, and has
2521:
Animation of Epicycloids, Pericycloids and Hypocycloids
2142: 1985: 1962: 1922: 1899: 1879: 1843: 1800: 1758: 1712: 1686: 1666: 1646: 1626: 1396: 1374: 1315: 1292: 1260: 1228: 1200: 1108: 1070: 1046: 1016: 950: 900: 830: 807: 787: 767: 735: 712: 666: 555: 351: 144: 108: 88: 30:
rolls around the outside of the large circle (radius
1007:
larger in area than the original stationary circle.
2381: 2284: 2127: 1968: 1956:From the figure, we see the position of the point 1944: 1905: 1885: 1861: 1822: 1780: 1738: 1692: 1672: 1652: 1632: 1405: 1380: 1354: 1298: 1278: 1243: 1206: 1114: 1090: 1052: 1022: 999: 933: 885: 813: 793: 773: 744: 718: 696: 645: 535: 331: 123: 94: 1834:From these two conditions, we get the identity 1355:{\displaystyle R\leq {\overline {OP}}\leq R+2r} 1945:{\displaystyle \alpha ={\frac {R}{r}}\theta } 8: 1873:By calculating, we get the relation between 2436:Epicycloid Evolute - from Wolfram MathWorld 1218:, then the curve never closes, and forms a 1168:total rotations of outer rolling circle = 1133:complete the 1st repeating pattern : 1000:{\displaystyle {\frac {(k+1)(k+2)}{k^{2}}}} 1306:on the small circle varies up and down as 2256: 2141: 2099: 1984: 1961: 1929: 1921: 1898: 1878: 1842: 1805: 1799: 1763: 1757: 1730: 1717: 1711: 1685: 1665: 1645: 1625: 1395: 1373: 1322: 1314: 1291: 1261: 1259: 1227: 1199: 1107: 1080: 1069: 1045: 1015: 989: 951: 949: 899: 874: 829: 806: 786: 766: 734: 711: 665: 614: 598: 554: 352: 350: 299: 209: 145: 143: 107: 87: 1124: 18: 2510:MacTutor History of Mathematics Archive 2407: 1416: 886:{\displaystyle A=(k+1)(k+2)\pi r^{2},} 135:for the curve can be given by either: 1184:Count the animation rotations to see 7: 1578:The epicycloid is a special kind of 1739:{\displaystyle \ell _{R}=\ell _{r}} 102:, and the larger circle has radius 2493:The Wolfram Demonstrations Project 1823:{\displaystyle \ell _{r}=\alpha r} 1781:{\displaystyle \ell _{R}=\theta R} 14: 2384:A catalog of special plane curves 1862:{\displaystyle \theta R=\alpha r} 82:If the smaller circle has radius 1561: 1544: 1527: 1510: 1489: 1468: 1445: 1422: 1279:{\displaystyle {\overline {OP}}} 944:It means that the epicycloid is 781:is a positive integer, the area 2388:. Dover Publications. pp.  1620:We assume that the position of 1585:An epicycle with one cusp is a 981: 969: 966: 954: 922: 910: 864: 852: 849: 837: 706:the smaller circle has radius 688: 673: 630: 618: 591: 579: 565: 559: 515: 503: 474: 462: 453: 447: 428: 416: 387: 375: 366: 360: 267: 255: 249: 243: 177: 165: 159: 153: 1: 1976:on the small circle clearly. 1286:from the origin to the point 729:the larger circle has radius 2447:Pietrocola, Giorgio (2005). 2304:Animated gif with turtle in 1413:= diameter of small circle . 1388:= radius of large circle and 1332: 1271: 697:{\displaystyle \theta \in ,} 2380:J. Dennis Lawrence (1972). 2567: 2318:List of periodic functions 1640:is what we want to solve, 934:{\displaystyle s=8(k+1)r.} 2515:University of St Andrews 1906:{\displaystyle \theta } 1886:{\displaystyle \alpha } 1693:{\displaystyle \theta } 1653:{\displaystyle \alpha } 1128:To close the curve and 1037:(i.e., sharp corners). 821:of this epicycloid are 2313: 2286: 2129: 1970: 1946: 1907: 1887: 1863: 1824: 1782: 1740: 1694: 1674: 1654: 1634: 1617: 1596:An epicycloid and its 1407: 1382: 1356: 1300: 1280: 1245: 1208: 1116: 1092: 1054: 1024: 1001: 935: 887: 815: 795: 775: 746: 720: 698: 647: 537: 333: 125: 96: 38: 2333:Deferent and epicycle 2303: 2287: 2130: 1971: 1947: 1908: 1888: 1864: 1825: 1783: 1741: 1695: 1675: 1655: 1635: 1615: 1408: 1383: 1357: 1301: 1281: 1246: 1209: 1117: 1102:, then the curve has 1093: 1091:{\displaystyle k=p/q} 1055: 1025: 1002: 936: 888: 816: 796: 776: 747: 721: 699: 648: 538: 334: 126: 97: 22: 2526:Spirograph -- GeoFun 2501:Robertson, Edmund F. 2140: 1983: 1960: 1920: 1897: 1877: 1841: 1798: 1756: 1710: 1684: 1664: 1644: 1624: 1394: 1372: 1313: 1290: 1258: 1244:{\displaystyle R+2r} 1226: 1198: 1106: 1100:irreducible fraction 1068: 1044: 1014: 948: 898: 828: 805: 785: 765: 733: 710: 664: 553: 349: 142: 133:parametric equations 124:{\displaystyle R=kr} 106: 86: 2499:O'Connor, John J.; 2491:" by Michael Ford, 1418:Epicycloid examples 757:Area and Arc Length 2471:Weisstein, Eric W. 2314: 2282: 2125: 1966: 1942: 1903: 1883: 1859: 1820: 1778: 1736: 1690: 1670: 1650: 1630: 1618: 1406:{\displaystyle 2r} 1403: 1378: 1352: 1296: 1276: 1241: 1204: 1112: 1088: 1050: 1020: 997: 931: 883: 811: 791: 771: 745:{\displaystyle kr} 742: 716: 694: 643: 533: 531: 329: 327: 121: 92: 39: 2551:Roulettes (curve) 2399:978-0-486-60288-2 2390:161, 168–170, 175 2338:Epicyclic gearing 2272: 2115: 1969:{\displaystyle p} 1937: 1673:{\displaystyle p} 1633:{\displaystyle p} 1589:, two cusps is a 1381:{\displaystyle R} 1335: 1299:{\displaystyle p} 1274: 1216:irrational number 1207:{\displaystyle k} 1182: 1181: 1115:{\displaystyle p} 1053:{\displaystyle k} 1023:{\displaystyle k} 995: 814:{\displaystyle s} 794:{\displaystyle A} 774:{\displaystyle k} 719:{\displaystyle r} 315: 281: 225: 191: 95:{\displaystyle r} 2558: 2546:Algebraic curves 2517: 2484: 2483: 2457: 2456: 2444: 2438: 2433: 2427: 2422: 2416: 2412: 2403: 2387: 2363:Roulette (curve) 2291: 2289: 2288: 2283: 2281: 2277: 2273: 2268: 2257: 2229: 2225: 2207: 2203: 2167: 2163: 2134: 2132: 2131: 2126: 2124: 2120: 2116: 2111: 2100: 2072: 2068: 2050: 2046: 2010: 2006: 1975: 1973: 1972: 1967: 1951: 1949: 1948: 1943: 1938: 1930: 1912: 1910: 1909: 1904: 1892: 1890: 1889: 1884: 1868: 1866: 1865: 1860: 1829: 1827: 1826: 1821: 1810: 1809: 1787: 1785: 1784: 1779: 1768: 1767: 1745: 1743: 1742: 1737: 1735: 1734: 1722: 1721: 1699: 1697: 1696: 1691: 1679: 1677: 1676: 1671: 1659: 1657: 1656: 1651: 1639: 1637: 1636: 1631: 1616:sketch for proof 1573: 1565: 1556: 1548: 1539: 1531: 1522: 1514: 1501: 1493: 1480: 1472: 1457: 1449: 1434: 1426: 1412: 1410: 1409: 1404: 1387: 1385: 1384: 1379: 1361: 1359: 1358: 1353: 1336: 1331: 1323: 1305: 1303: 1302: 1297: 1285: 1283: 1282: 1277: 1275: 1270: 1262: 1250: 1248: 1247: 1242: 1213: 1211: 1210: 1205: 1191: 1187: 1177: 1162: 1158: 1147: 1143: 1125: 1121: 1119: 1118: 1113: 1097: 1095: 1094: 1089: 1084: 1059: 1057: 1056: 1051: 1033: 1029: 1027: 1026: 1021: 1006: 1004: 1003: 998: 996: 994: 993: 984: 952: 940: 938: 937: 932: 892: 890: 889: 884: 879: 878: 820: 818: 817: 812: 800: 798: 797: 792: 780: 778: 777: 772: 751: 749: 748: 743: 725: 723: 722: 717: 703: 701: 700: 695: 652: 650: 649: 644: 642: 638: 637: 636: 606: 605: 542: 540: 539: 534: 532: 525: 521: 442: 438: 434: 355: 338: 336: 335: 330: 328: 324: 320: 316: 311: 300: 279: 238: 234: 230: 226: 221: 210: 189: 148: 130: 128: 127: 122: 101: 99: 98: 93: 36: 29: 2566: 2565: 2561: 2560: 2559: 2557: 2556: 2555: 2536: 2535: 2498: 2469: 2468: 2465: 2460: 2446: 2445: 2441: 2434: 2430: 2423: 2419: 2413: 2409: 2400: 2379: 2376: 2298: 2258: 2255: 2251: 2215: 2211: 2193: 2189: 2153: 2149: 2138: 2137: 2101: 2098: 2094: 2058: 2054: 2036: 2032: 1996: 1992: 1981: 1980: 1958: 1957: 1918: 1917: 1895: 1894: 1875: 1874: 1839: 1838: 1801: 1796: 1795: 1759: 1754: 1753: 1726: 1713: 1708: 1707: 1682: 1681: 1662: 1661: 1642: 1641: 1622: 1621: 1610: 1574: 1568: 1566: 1557: 1551: 1549: 1540: 1534: 1532: 1523: 1517: 1515: 1506: 1496: 1494: 1485: 1475: 1473: 1464: 1452: 1450: 1441: 1429: 1427: 1392: 1391: 1370: 1369: 1324: 1311: 1310: 1288: 1287: 1263: 1256: 1255: 1224: 1223: 1196: 1195: 1189: 1185: 1169: 1160: 1153: 1145: 1138: 1104: 1103: 1066: 1065: 1062:rational number 1042: 1041: 1031: 1012: 1011: 985: 953: 946: 945: 896: 895: 870: 826: 825: 803: 802: 801:and arc length 783: 782: 763: 762: 759: 731: 730: 708: 707: 662: 661: 610: 594: 578: 574: 551: 550: 530: 529: 502: 498: 440: 439: 415: 411: 347: 346: 326: 325: 301: 298: 294: 236: 235: 211: 208: 204: 140: 139: 104: 103: 84: 83: 80: 31: 24: 17: 12: 11: 5: 2564: 2562: 2554: 2553: 2548: 2538: 2537: 2534: 2533: 2528: 2523: 2518: 2496: 2485: 2464: 2463:External links 2461: 2459: 2458: 2439: 2428: 2417: 2406: 2405: 2404: 2398: 2375: 2372: 2371: 2370: 2365: 2360: 2355: 2350: 2345: 2340: 2335: 2330: 2325: 2320: 2297: 2294: 2293: 2292: 2280: 2276: 2271: 2267: 2264: 2261: 2254: 2250: 2247: 2244: 2241: 2238: 2235: 2232: 2228: 2224: 2221: 2218: 2214: 2210: 2206: 2202: 2199: 2196: 2192: 2188: 2185: 2182: 2179: 2176: 2173: 2170: 2166: 2162: 2159: 2156: 2152: 2148: 2145: 2135: 2123: 2119: 2114: 2110: 2107: 2104: 2097: 2093: 2090: 2087: 2084: 2081: 2078: 2075: 2071: 2067: 2064: 2061: 2057: 2053: 2049: 2045: 2042: 2039: 2035: 2031: 2028: 2025: 2022: 2019: 2016: 2013: 2009: 2005: 2002: 1999: 1995: 1991: 1988: 1965: 1954: 1953: 1941: 1936: 1933: 1928: 1925: 1902: 1882: 1871: 1870: 1858: 1855: 1852: 1849: 1846: 1832: 1831: 1819: 1816: 1813: 1808: 1804: 1789: 1788: 1777: 1774: 1771: 1766: 1762: 1747: 1746: 1733: 1729: 1725: 1720: 1716: 1689: 1669: 1649: 1629: 1609: 1606: 1576: 1575: 1567: 1560: 1558: 1550: 1543: 1541: 1533: 1526: 1524: 1516: 1509: 1507: 1495: 1488: 1486: 1474: 1467: 1465: 1451: 1444: 1442: 1428: 1421: 1419: 1415: 1414: 1402: 1399: 1389: 1377: 1363: 1362: 1351: 1348: 1345: 1342: 1339: 1334: 1330: 1327: 1321: 1318: 1295: 1273: 1269: 1266: 1240: 1237: 1234: 1231: 1203: 1180: 1179: 1165: 1164: 1150: 1149: 1135: 1134: 1130: 1129: 1111: 1087: 1083: 1079: 1076: 1073: 1049: 1019: 992: 988: 983: 980: 977: 974: 971: 968: 965: 962: 959: 956: 942: 941: 930: 927: 924: 921: 918: 915: 912: 909: 906: 903: 893: 882: 877: 873: 869: 866: 863: 860: 857: 854: 851: 848: 845: 842: 839: 836: 833: 810: 790: 770: 758: 755: 754: 753: 741: 738: 727: 715: 704: 693: 690: 687: 684: 681: 678: 675: 672: 669: 654: 653: 641: 635: 632: 629: 626: 623: 620: 617: 613: 609: 604: 601: 597: 593: 590: 587: 584: 581: 577: 573: 570: 567: 564: 561: 558: 544: 543: 528: 524: 520: 517: 514: 511: 508: 505: 501: 497: 494: 491: 488: 485: 482: 479: 476: 473: 470: 467: 464: 461: 458: 455: 452: 449: 446: 443: 441: 437: 433: 430: 427: 424: 421: 418: 414: 410: 407: 404: 401: 398: 395: 392: 389: 386: 383: 380: 377: 374: 371: 368: 365: 362: 359: 356: 354: 340: 339: 323: 319: 314: 310: 307: 304: 297: 293: 290: 287: 284: 278: 275: 272: 269: 266: 263: 260: 257: 254: 251: 248: 245: 242: 239: 237: 233: 229: 224: 220: 217: 214: 207: 203: 200: 197: 194: 188: 185: 182: 179: 176: 173: 170: 167: 164: 161: 158: 155: 152: 149: 147: 120: 117: 114: 111: 91: 79: 76: 15: 13: 10: 9: 6: 4: 3: 2: 2563: 2552: 2549: 2547: 2544: 2543: 2541: 2532: 2529: 2527: 2524: 2522: 2519: 2516: 2512: 2511: 2506: 2502: 2497: 2494: 2490: 2486: 2481: 2480: 2475: 2472: 2467: 2466: 2462: 2454: 2450: 2449:"Tartapelago" 2443: 2440: 2437: 2432: 2429: 2426: 2421: 2418: 2415: 2411: 2408: 2401: 2395: 2391: 2386: 2385: 2378: 2377: 2373: 2369: 2366: 2364: 2361: 2359: 2358:Multibrot set 2356: 2354: 2351: 2349: 2346: 2344: 2341: 2339: 2336: 2334: 2331: 2329: 2326: 2324: 2321: 2319: 2316: 2315: 2311: 2307: 2302: 2295: 2278: 2274: 2269: 2265: 2262: 2259: 2252: 2248: 2245: 2242: 2239: 2236: 2233: 2230: 2226: 2222: 2219: 2216: 2212: 2208: 2204: 2200: 2197: 2194: 2190: 2186: 2183: 2180: 2177: 2174: 2171: 2168: 2164: 2160: 2157: 2154: 2150: 2146: 2143: 2136: 2121: 2117: 2112: 2108: 2105: 2102: 2095: 2091: 2088: 2085: 2082: 2079: 2076: 2073: 2069: 2065: 2062: 2059: 2055: 2051: 2047: 2043: 2040: 2037: 2033: 2029: 2026: 2023: 2020: 2017: 2014: 2011: 2007: 2003: 2000: 1997: 1993: 1989: 1986: 1979: 1978: 1977: 1963: 1939: 1934: 1931: 1926: 1923: 1916: 1915: 1914: 1900: 1880: 1856: 1853: 1850: 1847: 1844: 1837: 1836: 1835: 1817: 1814: 1811: 1806: 1802: 1794: 1793: 1792: 1775: 1772: 1769: 1764: 1760: 1752: 1751: 1750: 1731: 1727: 1723: 1718: 1714: 1706: 1705: 1704: 1701: 1687: 1667: 1647: 1627: 1614: 1607: 1605: 1603: 1599: 1594: 1592: 1588: 1583: 1581: 1571: 1564: 1559: 1554: 1547: 1542: 1537: 1530: 1525: 1521:= 2.1 = 21/10 1520: 1513: 1508: 1505: 1504:quatrefoiloid 1499: 1492: 1487: 1484: 1478: 1471: 1466: 1463: 1462: 1455: 1448: 1443: 1440: 1439: 1432: 1425: 1420: 1417: 1400: 1397: 1390: 1375: 1368: 1367: 1366: 1349: 1346: 1343: 1340: 1337: 1328: 1325: 1319: 1316: 1309: 1308: 1307: 1293: 1267: 1264: 1254:The distance 1252: 1238: 1235: 1232: 1229: 1221: 1217: 1201: 1192: 1176: 1172: 1167: 1166: 1156: 1152: 1151: 1141: 1137: 1136: 1132: 1131: 1127: 1126: 1123: 1109: 1101: 1098:expressed as 1085: 1081: 1077: 1074: 1071: 1063: 1047: 1038: 1036: 1017: 1008: 990: 986: 978: 975: 972: 963: 960: 957: 928: 925: 919: 916: 913: 907: 904: 901: 894: 880: 875: 871: 867: 861: 858: 855: 846: 843: 840: 834: 831: 824: 823: 822: 808: 788: 768: 756: 739: 736: 728: 713: 705: 691: 685: 682: 679: 676: 670: 667: 659: 658: 657: 639: 633: 627: 624: 621: 615: 611: 607: 602: 599: 595: 588: 585: 582: 575: 571: 568: 562: 556: 549: 548: 547: 526: 522: 518: 512: 509: 506: 499: 495: 492: 489: 486: 483: 480: 477: 471: 468: 465: 459: 456: 450: 444: 435: 431: 425: 422: 419: 412: 408: 405: 402: 399: 396: 393: 390: 384: 381: 378: 372: 369: 363: 357: 345: 344: 343: 321: 317: 312: 308: 305: 302: 295: 291: 288: 285: 282: 276: 273: 270: 264: 261: 258: 252: 246: 240: 231: 227: 222: 218: 215: 212: 205: 201: 198: 195: 192: 186: 183: 180: 174: 171: 168: 162: 156: 150: 138: 137: 136: 134: 118: 115: 112: 109: 89: 77: 75: 72: 70: 66: 65: 60: 56: 52: 49:(also called 48: 44: 34: 27: 21: 2508: 2505:"Epicycloid" 2477: 2474:"Epicycloid" 2452: 2442: 2431: 2420: 2410: 2383: 2353:Hypotrochoid 1955: 1872: 1833: 1790: 1748: 1702: 1619: 1595: 1584: 1577: 1572:= 7.2 = 36/5 1569: 1555:= 5.5 = 11/2 1552: 1538:= 3.8 = 19/5 1535: 1518: 1503: 1497: 1482: 1476: 1459: 1453: 1436: 1430: 1364: 1253: 1220:dense subset 1193: 1183: 1174: 1170: 1154: 1139: 1039: 1009: 943: 760: 655: 545: 341: 81: 73: 62: 51:hypercycloid 50: 46: 40: 32: 25: 2348:Hypocycloid 2343:Epitrochoid 1913:, which is 1580:epitrochoid 131:, then the 61:—called an 55:plane curve 2540:Categories 2489:Epicycloid 2374:References 2368:Spirograph 1483:trefoiloid 1178:rotations 1163:rotations 1148:rotations 660:the angle 47:epicycloid 2479:MathWorld 2275:θ 2249:⁡ 2240:− 2237:θ 2234:⁡ 2201:α 2195:θ 2187:⁡ 2178:− 2175:θ 2172:⁡ 2118:θ 2092:⁡ 2083:− 2080:θ 2077:⁡ 2044:α 2038:θ 2030:⁡ 2021:− 2018:θ 2015:⁡ 1940:θ 1924:α 1901:θ 1881:α 1854:α 1845:θ 1815:α 1803:ℓ 1773:θ 1761:ℓ 1728:ℓ 1715:ℓ 1688:θ 1648:α 1338:≤ 1333:¯ 1320:≤ 1272:¯ 868:π 686:π 671:∈ 668:θ 634:θ 608:− 603:θ 563:θ 519:θ 496:⁡ 487:− 484:θ 481:⁡ 451:θ 432:θ 409:⁡ 400:− 397:θ 394:⁡ 364:θ 318:θ 292:⁡ 283:− 277:θ 274:⁡ 247:θ 228:θ 202:⁡ 193:− 187:θ 184:⁡ 157:θ 78:Equations 2328:Cyclogon 2310:Cardioid 2296:See also 1591:nephroid 1587:cardioid 1461:nephroid 1438:cardioid 1122:cusps. 69:roulette 64:epicycle 43:geometry 2323:Cycloid 2306:MSWLogo 1602:similar 1598:evolute 656:where 53:) is a 2495:, 2007 2453:Maecla 2396:  1680:, and 1365:where 1214:is an 1064:, say 280:  190:  59:circle 1791:and 1608:Proof 1060:is a 1035:cusps 726:, and 45:, an 2394:ISBN 1893:and 1600:are 1502:; a 1481:; a 1458:; a 1435:; a 1188:and 342:or: 35:= 3) 28:= 1) 2246:sin 2231:sin 2184:sin 2169:sin 2089:cos 2074:cos 2027:cos 2012:cos 1500:= 4 1479:= 3 1456:= 2 1433:= 1 1194:If 1159:to 1157:= 0 1144:to 1142:= 0 1040:If 1010:If 493:sin 478:sin 406:cos 391:cos 289:sin 271:sin 199:cos 181:cos 41:In 2542:: 2513:, 2507:, 2503:, 2476:. 2451:. 2392:. 1604:. 1593:. 1582:. 1251:. 1173:+ 71:. 2487:" 2482:. 2455:. 2402:. 2312:) 2308:( 2279:) 2270:r 2266:r 2263:+ 2260:R 2253:( 2243:r 2227:) 2223:r 2220:+ 2217:R 2213:( 2209:= 2205:) 2198:+ 2191:( 2181:r 2165:) 2161:r 2158:+ 2155:R 2151:( 2147:= 2144:y 2122:) 2113:r 2109:r 2106:+ 2103:R 2096:( 2086:r 2070:) 2066:r 2063:+ 2060:R 2056:( 2052:= 2048:) 2041:+ 2034:( 2024:r 2008:) 2004:r 2001:+ 1998:R 1994:( 1990:= 1987:x 1964:p 1952:. 1935:r 1932:R 1927:= 1869:. 1857:r 1851:= 1848:R 1830:. 1818:r 1812:= 1807:r 1776:R 1770:= 1765:R 1732:r 1724:= 1719:R 1668:p 1628:p 1570:k 1553:k 1536:k 1519:k 1498:k 1477:k 1454:k 1431:k 1401:r 1398:2 1376:R 1350:r 1347:2 1344:+ 1341:R 1329:P 1326:O 1317:R 1294:p 1268:P 1265:O 1239:r 1236:2 1233:+ 1230:R 1202:k 1190:q 1186:p 1175:q 1171:p 1161:p 1155:α 1146:q 1140:θ 1110:p 1086:q 1082:/ 1078:p 1075:= 1072:k 1048:k 1032:k 1018:k 991:2 987:k 982:) 979:2 976:+ 973:k 970:( 967:) 964:1 961:+ 958:k 955:( 929:. 926:r 923:) 920:1 917:+ 914:k 911:( 908:8 905:= 902:s 881:, 876:2 872:r 865:) 862:2 859:+ 856:k 853:( 850:) 847:1 844:+ 841:k 838:( 835:= 832:A 809:s 789:A 769:k 752:. 740:r 737:k 714:r 692:, 689:] 683:2 680:, 677:0 674:[ 640:) 631:) 628:1 625:+ 622:k 619:( 616:i 612:e 600:i 596:e 592:) 589:1 586:+ 583:k 580:( 576:( 572:r 569:= 566:) 560:( 557:z 527:. 523:) 516:) 513:1 510:+ 507:k 504:( 500:( 490:r 475:) 472:1 469:+ 466:k 463:( 460:r 457:= 454:) 448:( 445:y 436:) 429:) 426:1 423:+ 420:k 417:( 413:( 403:r 388:) 385:1 382:+ 379:k 376:( 373:r 370:= 367:) 361:( 358:x 322:) 313:r 309:r 306:+ 303:R 296:( 286:r 268:) 265:r 262:+ 259:R 256:( 253:= 250:) 244:( 241:y 232:) 223:r 219:r 216:+ 213:R 206:( 196:r 178:) 175:r 172:+ 169:R 166:( 163:= 160:) 154:( 151:x 119:r 116:k 113:= 110:R 90:r 37:. 33:R 26:r

Index


geometry
plane curve
circle
epicycle
roulette
parametric equations
cusps
rational number
irreducible fraction
irrational number
dense subset
k = 1; a cardioid
cardioid
k = 2; a nephroid
nephroid
k = 3; a trefoiloid
k = 4; a quatrefoiloid
k = 2.1 = 21/10
k = 3.8 = 19/5
k = 5.5 = 11/2
k = 7.2 = 36/5
epitrochoid
cardioid
nephroid
evolute
similar


MSWLogo

Text is available under the Creative Commons Attribution-ShareAlike License. Additional terms may apply.