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Just expand formula for sin(A+B) and cos (A+B) you'll get final answer as 5/4( sin^2x + cos^2x ) thus gof becomes g(5/4) = 1
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Just expand formula for sin(A+B) and cos (A+B) you'll get final answer as 5/4( sin^2x + cos^2x ) thus gof becomes g(5/4) = 1