用公式计算正弦余弦正切
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圆周分成360°每度分成60份整个圆周为21600份
3606021600
21600
三角函数表
角度正正弦余弦343810.0174524060.999847695
20.0348994970.999390827正弦sin30.0523359560.998629535余弦cos40.0697564740.99756405正切tan 50.0871557430.996194698余切cot 60.1045284630.994521895正割sec 70.1218693430.992546152余割csc80.1391731010.990268069
90.1564344650.987688341
100.1736481780.984807753
110.1908089950.981627183
120.2079116910.978147601
130.2249510540.974370065
140.2419218960.970295726
150.2588190450.965925826
160.2756373560.961261696
170.2923717050.956304756
180.3090169940.951056516
190.3255681540.945518576
200.3420201430.939692621
210.358367950.933580426
220.3746065930.927183855
230.3907311280.920504853
240.4067366430.913545458
250.4226182620.906307787
260.4383711470.898794046
270.45399050.891006524
280.4694715630.882947593
290.484809620.874619707
300.50.866025404
310.5150380750.857167301
320.5299192640.848048096
330.5446390350.838670568
340.5591929030.829037573
350.5735764360.819152044
360.5877852520.809016994
370.6018150230.79863551
380.6156614750.788010754
390.6293203910.777145961
400.642787610.766044443 410.6560590290.75470958 420.6691306060.743144825 430.681998360.731353702 440.694658370.7193398 450.7071067810.707106781 460.71933980.69465837 470.7313537020.68199836 480.7431448250.669130606 490.754709580.656059029 500.7660444430.64278761 510.7771459610.629320391 520.7880107540.615661475 530.798635510.601815023 540.8090169940.587785252 550.8191520440.573576436 560.8290375730.559192903 570.8386705680.544639035 580.8480480960.529919264 590.8571673010.515038075 600.8660254040.5 610.8746197070.48480962 620.8829475930.469471563 630.8910065240.4539905 640.8987940460.438371147 650.9063077870.422618262 660.9135454580.406736643 670.9205048530.390731128 680.9271838550.374606593 690.9335804260.35836795 700.9396926210.342020143 710.9455185760.325568154 720.9510565160.309016994 730.9563047560.292371705 740.9612616960.275637356 750.9659258260.258819045 760.9702957260.241921896 770.9743700650.224951054 780.9781476010.207911691 790.9816271830.190808995 800.9848077530.173648178 810.9876883410.156434465 820.9902680690.139173101 830.9925461520.121869343 840.9945218950.104528463 850.9961946980.087155743 860.997564050.069756474
870.9986295350.052335956 880.9993908270.034899497 890.9998476950.017452406 901
2πr=2160021600得出r=3438﹝近似值﹞勾
用勾股定理先算出30°、45°、90°的正弦之后3
获得每隔3°45'的正弦长表
于是他定圆的半径为10151000000000000000.00
0.25
正切余切
0.01745506557.28996163
0.03492076928.63625328
0.05240777919.08113669
0.06992681214.30066626
0.0874*******.4300523
0.1051042359.514364454
0.1227845618.144346428
0.1405408357.115369722
0.15838444 6.313751515
0.176326981 5.67128182
0.194380309 5.144554016
0.212556562 4.704630109
0.230868191 4.331475874
0.249328003 4.010780934
0.267949192 3.732050808
0.286745386 3.487414444
0.305730681 3.270852618
0.324919696 1.880726465
0.344327613 2.904210878
0.363970234 2.747477419
0.383864035 2.605089065
0.404026226 2.475086853
0.424474816 2.246036774
0.445228685 2.475086853
0.466307658 2.144506921
0.487732589 2.050303842
0.509525449 1.962610506
0.531709432 1.279941632
0.554309051 1.804047755
0.577350269 1.732050808
0.600860619 1.664279482
0.624869352 1.600334529
0.649407593 1.539864964
0.674508517 1.482560969
0.700207538 1.428148007
0.726542528 1.37638192
0.75355405 1.327044822
0.7812856270.900404044
0.809784033 1.234897157