Question

The expression sin 2A = 2 sin A is true if A =

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Answer 1

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Question is based on trigonometric double angle formula for sin2A=2sinAcosA. As a first step bring all terms to LHS. Therefore, the value of A=0.

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Answer 2

Answer:

sin2a=2sinAid true then A______A,0 ,B,30,C,45,D,60 Is medium answer

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