1) √2 tan β 2) tan β 3) sin 2β 4) √2 cot β Answer: (1) √2 tan β Solution: Given, cos 2α = (3 cos 2β - 1)/(3 - cos 2β)....(i)... View Article
1) 2 sin nθ 2) 2 cos nθ 3) sin (2nθ) 4) cos (2n θ) Answer: (2) 2 cos nθ Solution: Given, x + 1/x = 2 cos θ Let x = cos θ + i sin... View Article