$sin 2 A = 2 sin A$ , find $A$ .

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Solution

$sin 2 A = 2 sin A$
$⟹ 2 sin A cos A = 2 sin A$
$⟹ sin A = 0$ or $cos A = 1$
$⟹ A = 0$

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sin2A=2sinA, find A.

sin2A=2sinA⟹2sinAcosA=2sinA⟹sinA=0 or cosA=1⟹A=0

$sin 2 A = 2 sin A$ , find $A$ .

$sin 2 A = 2 sin A$
$⟹ 2 sin A cos A = 2 sin A$
$⟹ sin A = 0$ or $cos A = 1$
$⟹ A = 0$