4) cos²x - 3 Sin²x + 3 = 0
cos²x - 3 Sin²x + 3 = 0
1 - sin²x - 3 sin²x + 3 = 0
4 - 4 sin²x = 0
4 sin²x = 4
sin²x = 1
sin x = +-1
x = 90° dan 270°
[answer.2.content]cos²x - 3 Sin²x + 3 = 0
1 - sin²x - 3 sin²x + 3 = 0
4 - 4 sin²x = 0
4 sin²x = 4
sin²x = 1
sin x = +-1
x = 90° dan 270°
[answer.2.content]