Use a Calculator to Find an Approximate Value of Each $\cos ^ { - 1 } ( 0.34567 )$

Short Answer

Use a calculator to find an approximate value of each expression correct to five decimal places, if it is defined.
(a)
$\cos ^ { - 1 } ( 0.34567 )$
(b)
$\sin ^ { - 1 } ( - 0.34567 )$
(c)
$\tan ^ { - 1 } ( 0.34567 )$