Q39 of 51 Page 54

If a cos 3θ + 3 sin2θ cosθ = m and sin3θ + 3 a sinθ cos2θ = n then prove that: .

Given:


a cos 3θ + 3 sin2 θ cos θ = m


sin 3θ + 3 a sin θ cos 2θ = n


Now adding both the equations we get,






Adding (i) and (ii) we get,






Hence, Proved.


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