3sin4x°+3=0 Mohon Bantuan nya ya

Bab Trigonometri
Matematika SMA Kelas X

3 sin 4x + 3 = 0
3 sin 4x = - 3
sin 4x = -3/3
sin 4x = -1

4x = 270°
x = 67,5°

4x = 270° + 1 x 360°
x = 630°/4
x = 157,5°

HP = {67,5° dan 157,5°}