Question

given that (1+cosα)(1+cosα)(1+ cosβ) = (1-cosα)(1-cosβ)(1-cosβ)​

Answer 1

(1+cosα)(1+cosα)(1+ cosβ) = (1-cosα)(1-cosβ)(1-cosβ)​

=>  (1+cosα)²(1+ cosβ) =(1-cosα)(1-cosβ)²

=>  (1+cosα)²/(1-cosα)=(1-cosβ)²/(1+ cosβ)

=>  

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