Question

if sin square is equals to 2 sin a find the value of a

Answer 1

So I use an identity of trigonometry i.e

sin2A=2sinAcosA

Thus

2sinAcosA=2sinA

Or sinAcosA-sinA=0

Now sinA(cosA-1)=0

Therefore we have either sinA=0 or cosA=1

Taking general solution we have

A= n*pie (n=Integer) (for sinA )
A= 2n*pie(n=Integer)(for cosA)
Thus taking union of solution we have A=n*pie..

Answer 2

your answer is a belongs to nπ where n is any interger
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