0. Functions

Evaluate the expression.

$\sin^{-1}\left(\frac{\sqrt2}{2}\right)$

Evaluate the expression.

$\cos^{-1}\left(-1\right)$

Evaluate the expression.

$\cos^{-1}\left(0\right)$

Evaluate the expression.

$\cos^{-1}\left(-\frac{\sqrt2}{2}\right)$