Tolong kerjakan nomor 3 dan 4 cepattt

TriGonoMetRi

3][
2 sin² x - 5 sin x = -2
(2 sin x - 1)(sin x - 2) = 0
sin x = 1/2 atau sin x = 2

sin x = 1/2
x = 30° , 150°

HP = {30° , 150°}

4][
sin x + cos x = -√2
Kuadratkan kdua ruas
1 + 2 sin x cos x = 2
sin 2x = 2 - 1
sin 2x = 1
2x = 90° + k.360°
x = 45° + k.180°

HP = {45° , 225°}

...semoga membantu...