^ -1 [ (2 ^ -1 ( 2-1))]= .............. - Vidyadip

MCQ

$\cos^{-1}[\cos(2\cot^{-1}(\sqrt2-1))]= ..............$

A
$\sqrt2-1$
B
$1+\sqrt2$
C
$\frac{\pi}{4}$
✓
$\frac{3\pi}{4}$

✓

Answer

Correct option: D.

$\frac{3\pi}{4}$

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