15^ + 105^ = - Vidyadip

MCQ

$\sin 15^\circ + \cos 105^\circ = $

✓
$0$
B
$2\sin 15^\circ $
C
$\cos 15^\circ + \sin 15^\circ $
D
$\sin 15^\circ - \cos 15^\circ $

✓

Answer

Correct option: A.

$0$

a
(a) $\sin 15^\circ + \cos 105^\circ $

$\sin 15^\circ + \cos (90^\circ + 15^\circ ) = \sin 15^\circ - \sin 15^\circ = 0$.

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