Tentukan himpunan penyelesaian persamaan berikut untuk 0< x < 360 2cosx.sinx = sinx
Takamori37
2cos x.sin x = sin x (sin x dapat dicoret mengingat sin x ≠ 0) 2cos x = 1 cos x = 1/2 cos x = cos 60 Solusi 1: x = 60 Solusi 2: x = -60 (+360) x = 300 Maka, HP = {x | 60,300}
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whongaliem2cosx.sinx = sinx bagi kedua rusanya dengan sin x 2.cos x = 1 cos x = 1/2 x = x = - = Hp = ()
(sin x dapat dicoret mengingat sin x ≠ 0)
2cos x = 1
cos x = 1/2
cos x = cos 60
Solusi 1:
x = 60
Solusi 2:
x = -60 (+360)
x = 300
Maka,
HP = {x | 60,300}
2.cos x = 1
cos x = 1/2
x =
x = -
=
Hp = ()