Q. 163.7( 6 Votes )

Solve the following equations:
, then x is equal to [CBSE 2013]

Answer :


Now we will put Now, we will put x= siny in the given equation, and we get,






1 – siny = cos2y as


1 - cos2y = sin y


2sin2y = sin y


siny(2siny - 1) = 0


siny = 0 or 1/2


x = 0 or 1/2


Now, if we put then we will see that,


L.H.S. =




R.H.S


Hence, is not the solution of the given equation.


Thus, x =

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