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Cos4theta-cos2theta=sin4theta-sin2theta |
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Answer» Step-by-step explanation: Proof :- We have , LHS = cos ^4 theta - cos ^2 theta = cos^2 theta ( cos^2 theta - 1) = -sin^2 theta cos^2 theta ........(1) RHS = sin^4 theta - sin ^2 theta = sin^2 theta ( sin^2 theta -1) = - sin^2 theta • cos^2 theta ............(2) From (1) and (2), we have LHS = RHS cos^4 theta - cos^2 theta = sin^4 theta - sin^2 theta Hence , proved PLEASE MARK it as BRAINLIEST and follow me please |
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