The value of ( ^ - 1 ( 2)) is - Vidyadip

MCQ

The value of $\cos ({\tan ^{ - 1}}(\tan 2))$ is

A
$\frac{1}{{\sqrt 5 }}$
B
$ - \frac{1}{{\sqrt 5 }}$
✓
$\cos \,2$
D
$ - \cos 2$

✓

Answer

Correct option: C.

$\cos \,2$

c
(c) $\cos [{\tan ^{ - 1}}(\tan 2)] = \cos 2$.

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