If =30^ then 2 is : - Vidyadip

MCQ

If $\theta=30^\circ$ then $\tan2\theta$ is :

A
$0$
B
$1$
✓
$\frac{1}{2}$
D
$\frac{\sqrt{3}}{2}$

✓

Answer

Correct option: C.

$\frac{1}{2}$

Given : $\theta=30^\circ\cos2\theta$
$=\cos2(30^\circ)=\cos60^\circ=\frac{1}{2}$

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