Question

What is the value of sin inverse?

Answer 1

The value of sin inverse

1. ${\sin }^{-1}(-1)=\arcsin (-1)$
2. They both return the angle that has a sin of $-1$.
3. If you envision a unit circle and follow the vertical axis that represents sine to the $-1$ value you will see it is at $270$ degrees or $\frac{3\pi }{2}$.