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

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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

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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

1 Answers

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Other Related Questions on Trigonometry

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