Use a Calculator to Find an Approximate Value of Each $\tan ^ { - 1 } ( 3 )$

question 56

Essay

Use a calculator to find an approximate value of each expression correct to five decimal places, if it is defined.
(a)
$\tan ^ { - 1 } ( 3 )$
(b)
$\sin ^ { - 1 } ( - 3 )$

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