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Prove the following trigonometric identities.If a cos3 θ + 3 a cos θ sin2 θ = m, a sin3 θ + 3 a cos2 θ sin θ = n, prove that (m + n)2/3 + (m − n)2/3 = 2a2/3 |
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Answer» Prove the following trigonometric identities. If a cos3 θ + 3 a cos θ sin2 θ = m, a sin3 θ + 3 a cos2 θ sin θ = n, prove that (m + n)2/3 + (m − n)2/3 = 2a2/3 |
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