Question

1) ctg x - tg x = (cos x - sin x) / (1/2*sin 2x)
2) sin^2 x *(tg x+1)+3sin(cos x - sin x)+3=0

Answer 1

1) ctg x - tg x = (cos x - sin x) / (1/2*sin 2x)
x ∈ {2*пи*k, 2*пи*k-1065/452}, k ∈ Z
2)  sin^2 x *(tg x+1)+3sin(cos x - sin x)+3=0
x ∈ ∅