Answer :
Formula: -
(i) 
(ii) cos(A + B) = cosAcosB – sinAsinB
(iii) if cosθ = cosα then general solution will be θ = 2nπ±α where n∈Z
√3 Cos x – Sin x = 1
dividing by 2
using formula(ii)
using formula(ii)
using formula (iii)
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