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If three angles A, B, C are such that cos A + cos B + cos C = 0 and if cos A cos B cos C =λ(cos 3A+cos 3B+cos 3C), then λ is equal to

Answer» If three angles A, B, C are such that cos A + cos B + cos C = 0 and if cos A cos B cos C =λ(cos 3A+cos 3B+cos 3C), then λ is equal to


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