2 A B is equal to : - Vidyadip

MCQ

$2 \sin A \sin B$ is equal to :

A
$\sin (A+B)+\sin (A-B)$
B
$\sin (A+B)-\sin (A-B)$
C
$\cos ( A + B )+\cos ( A - B )$
✓
$\cos (A-B)-\cos (A+B)$

✓

Answer

Correct option: D.

$\cos (A-B)-\cos (A+B)$

(D)

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