untuk 0 ≤ x ≤ 2π , tentukan himpunan penyelesaian persmaan a. 4 sin x = 2 √3 b. 6 cos x = 3

4 sin x = 2√3
Sin x = 2√3/4 = 1/2 √3 => sin positif dikuadran 1 dan 2
Kuadran 1 : x = 60° = π/3
Kuadran 2 : x = (180° - 60°) = 120° = 2π/3
HP = {π/3, 2π/3}

6 cos x = 3
cos x = 3/6 = 1/2 => cos positif di kuadran 1 dan 4
Kuadran 1 : x = 60° = π/3
Kuadran 4 : x = (360° - 60°) = 300° = 5π/3
HP = {π/3, 5π/3}