If A = 3 2 , then 3A = - Vidyadip

MCQ

If $\cos A = \frac{{\sqrt 3 }}{2},$ then $\tan 3A = $

A
$0$
B
$1/2$
C
$1$
✓
$\infty $

✓

Answer

Correct option: D.

$\infty $

d
(d) We have $\cos A = \frac{{\sqrt 3 }}{2} $

$\Rightarrow A = {30^o}$

==> $\tan 3A = \tan {90^o} = \infty $.

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