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  • If sin 2A = sin A find the value of A

If sin 2A = sin A find the value of A

Answers (1)

sin 2A  = sin A

2 sin A cos A = sin A

2 sin A cos A = sin A

2 sin A cos A - sin A = 0

sin A ( 2 cos A -1)  = 0

sin A = 0 or cos A = 1/2

A = 0 or A = 600

Posted by

Ravindra Pindel

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