First, the formula of the degree of crime

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

Third, Tandu formula

1, tan 30= root number 3/3

2. Tan 45= 1

3, tan 60= root number 3

Correlation formula:

1.sinh- 1x dx = xSinh- 1x-+c。

Second, cosh-1xdx = xcosh-1x-+C.

Three. TANH- 1x dx = XTANH- 1x+LN | 1-X2 |+c

Four. coth- 1x dx = xcotth- 1x-ln | 1-x2 |+c。

Verb (abbreviation of verb) sech-1xdx = xsech-1x-sin-1x+C.