If Cos (Ɵ-α), Cos Ɵ, Cos (Ɵ+α) are in H.P., then prove that Cos2Ɵ = 1+Cosα
If Cos (Ɵ-α), Cos Ɵ, Cos (Ɵ+α) are in H.P., then prove that Cos2Ɵ = 1+Cosα
Sanjay Kumar , 9 Years ago
Grade 11
Trigonometry> If Cos (Ɵ-α), Cos Ɵ, Cos (Ɵ+α) are in H.P...
1 Answers
Faiz
Your question is incomplete as the value of cosine of the middle term is missing....plese review your question
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