Q12 of 142 Page 11

If 2 sin2 x = 3 cos x, where 0 ≤ x ≤ 2 π, then find the value of x.

2sin2x=3cos x


2-2cos2x=3cos x


Solving the quadratic equation, we get


cos x= 1/2


Therefore x=60° and 300°


i.e.




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