Find the Exact Value of Each Expression, If It Is $\sin ^ { - 1 } ( - 2 )$

question 19

Essay

Find the exact value of each expression, if it is defined.
(a)
$\sin ^ { - 1 } ( - 2 )$ ( b)
$\cos ^ { - 1 } ( - \sqrt { 3 } )$
(c)
$\tan ^ { - 1 } ( - 1 )$