^ -1 1-x^2 1+x^2 = - Vidyadip

MCQ

$\cos ^{-1} \frac{1-x^2}{1+x^2}=$

A
$2 \cos ^{-1} x$
B
$2 \sin ^{-1} x$
✓
$2 \tan ^{-1} x$
D
$\cos ^{-1} 2 x$

✓

Answer

Correct option: C.

$2 \tan ^{-1} x$

C

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