1) 2 sin x cos x - √3 cos x = 0 cos x (2 sin x - √3) = 0 cos x = 0 2 sin x - √3 = 0 x₁ = π/2 + πn, n∈Z sin x = √3/2 x₂ = (-1)^n · π/3 + πn, n∈Z 2) 2 sin x cos x - √2 cos x = 0 cos x (2sin x - √2) = 0 cos x = 0 2 sin x - √2 = 0 x₁ = π/2 + πn, n∈Z sin x = √2/2 x₂ = (-1)^n · π/4 + πn, n∈Z