Solve for x : 2 3x - 1 = 0 - Vidyadip

Question

Solve for $x : 2 \cos \ 3x - 1 = 0$

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Answer

$2 \cos 3 x-1=0 $
$ \cos 3 x=\frac{1}{2} $
$3 x=60^{\circ} $
$ x=20^{\circ}$

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