(3 4 +x )- (3 4 -x )= - Vidyadip

MCQ

$\cos \left(\frac{3 \pi}{4}+x\right)-\cos \left(\frac{3 \pi}{4}-x\right)=$

A
$-\sqrt{2} \sin x$
B
$\sqrt{2} \sin x$
C
$\cos x$
D
$-\sqrt{2} \cos x$

✓

Answer

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