If A = 130^ and x = A + A, then - Vidyadip

MCQ

If $A = 130^\circ $ and $x = \sin A + \cos A,$ then

✓
$x > 0$
B
$x < 0$
C
$x = 0$
D
$x \le 0$

✓

Answer

Correct option: A.

$x > 0$

a
(a) $x = \cos 40^\circ + \cos 130^\circ $

$= 2\cos 85^\circ \cos 45^\circ > 0$.

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