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If Cos (Ɵ-α), Cos Ɵ, Cos (Ɵ+α) are in H.P., then prove that Cos 2 Ɵ = 1+Cosα

If Cos  (Ɵ-α), Cos Ɵ, Cos (Ɵ+α)   are in H.P., then prove that Cos2Ɵ = 1+Cosα

Grade:11

1 Answers

Faiz
107 Points
4 years ago
Your question is incomplete as the value of cosine of the middle term is missing....plese review your question

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