Cos@= adjacent edge/hypotenuse
Tan@= opposite/adjacent edge
Cot@= adjacent edge/opposite edge
A, the degree of evil formula
1、sin 30= 1/2
2, sin 45= root number 2/2
3.sin 60= root number 3/2
Second, cos degree formula
1, cos 30= root number 3/2
2, cos 45= root number 2/2
3、cos 60= 1/2
Three. Sunlight formula
1, tan 30= root number 3/3
2. Tan 45= 1
3, tan 60= root number 3
Extended data:
sin0=sin0 =0
cos0=cos0 = 1
tan 0 = tan 0 = 0 sin 15 = 0.650;
sin 15 =0.259
cos 15 =-0.759; cos 15 =0.966
tan 15 =-0.855; tan 15 =0.268
sin30 = 1/2
cos30 = 0.866
Baidu encyclopedia-trigonometric function value