sin²2x-2 sinx cos x-2=0
Matematika
Nurlitasyhrn
Pertanyaan
sin²2x-2 sinx cos x-2=0
1 Jawaban
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1. Jawaban Anonyme
sin²2x-2 sinx cos x-2=0
sin²2x- sin2x-2=0
(sin2x - 2) (sin2x +1)
sin2x = 2
(tak ada sin bernilai 2)
sin2x = -1
2x = 270°
x = 135°