Question

Find the value of x if Sin 2x=sin60cos30-cos 60-sin 30

Answer 1

$2x = \sin(60). \cos(30) - \cos(60) . \sin(30)$
because we know that ,
$\sin( a - b) = \sin(a) \cos(b) - \cos(a) \sin(b)$
thus,
$si2x = \sin(30)$
$2x = 30$
$x = 15$
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