完整的三角函数值表包含了从0度到90度(包括0度和90度)的各个角度的正弦(sin)、余弦(cos)、正切(tan)值。以下是这个范围内的三角函数值表:
0度: sin(0°) = 0, cos(0°) = 1, tan(0°) = 0
5度: sin(5°) = 0.08715574274765816, cos(5°) = 0.9961946980915838, tan(5°) = 0.0874313123623322
10度: sin(10°) = 0.17364817766693033, cos(10°) = 0.984807753012208, tan(10°) = 0.1763269805602409
15度: sin(15°) = 0.25881904510252074, cos(15°) = 0.9659258262890683, tan(15°) = 0.267949192431123
20度: sin(20°) = 0.3420201433256687, cos(20°) = 0.891921264829744, tan(20°) = 0.3826834323650898
25度: sin(25°) = 0.42261826174069944, cos(25°) = 0.819152037794914, tan(25°) = 0.5157777777777778
30度: sin(30°) = 0.49999999999999994, cos(30°) = 0.8660254037844386, tan(30°) = 0.6123724356957946
35度: sin(35°) = 0.573576436351046, cos(35°) = 0.753982277161786, tan(35°) = 0.76159415984883
40度: sin(40°) = 0.642787609686539, cos(40°) = 0.642787609686539, tan(40°) = 1.6
45度: sin(45°) = √2/2, cos(45°) = √2/2, tan(45°) = 1
50度: sin(50°) = √6/4, cos(50°) = (√6 + √2)/4, tan(50°) = (√3 - 1)/(√3 + 1)
55度: sin(55°) = (√6 + √2)/4, cos(55°) = (√6 - √2)/4, tan(55°) = (√3 + 1)/(√3 - 1)
60度: sin(60°) = (√3)/2, cos(60°) = (√3)/2, tan(60°) = (√3)/3
65度: sin(65°) = (√15 - 1)/4, cos(65°) = (√15 + 1)/4, tan(65°) = (√15 - 1)/(√15 + 1)
70度: sin(70°) = (√2 + √6)/4, cos(70°) = (√2 - √6)/4, tan(7
1、sin(α+β)=sinαcosβ+ sinβcosα
2、sin(α-β)=sinαcosβ-sinB*cosα
3、cos(α+β)=cosαcosβ-sinαsinβ
4、cos(α-β)=cosαcosβ+sinαsinβ
5、tan(α+β)=(tanα+tanβ) / (1-tanαtanβ)