1.

If cos x=12 a+1a, and cos 3 x = λ a3+1a3, then λ=(a) 14(b) 12(c) 1(d) none of these

Answer» If cos x=12 a+1a, and cos 3 x = λ a3+1a3, then λ=

(a) 14



(b) 12



(c) 1



(d) none of these


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