The general solution of the equatio...
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The general solution of the equation 2cos2x = 3.2cos2x - 4 is (A) x = 2n1, nel (B) X = n ,n el (C) x=nt/4, nel (D) X = n/2, nel

JEE/Engineering Exams
Maths
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( 2 cdot cos 2 x=2left(2 cos ^{2} x-1right) ) ( x+cos 2 x=2 cos ^{2} x-4 ) ( x=2 cos ^{2} x ) ( frac{cos x=pm 1}{x}=n pi, n in I )
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