If cos3θ = αcosθ+βcos3θ, then (α,β) =
(3,4)
(4,3)
(-3,4)
(3,-4)
Given that cos3θ=αcosθ+βcos3θ
But cos3θ=4cos3θ−3cosθ ⇒ (α,β) = (-3, 4).
If cos 3theta = αcosθ+βcos3θ, then (α,β) =