4(sin2θ + cosθ)=5 সমীকরণের সাধারণ সমাধান -
A
θ=2nπ ±π/2
B
θ=2nπ ±π/3
C
θ=2nπ ±π/4
D
θ=2nπ±π/5
Correct Answer: θ=2nπ ±π/3