Arcsine definition

The arcsine function is the inverse function of y = sin(x).

arcsin(y) = sin^-1(y) = x + 2kπ

For every

k = {…,-2,-1,0,1,2,…}

For example, If the sine of 30° is 0.5:

sin(30°) = 0.5

Then the arcsine of 0.5 is 30°:

arcsin(0.5) = sin^-1(0.5) = 30°

Arcsine table