3 cos^2x-2 sin^2x=-3 , 0
Matematika
masfaridz
Pertanyaan
3 cos^2x-2 sin^2x=-3 , 0<x<2pi... bantu jawab..
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1. Jawaban eripane05
3cos² x - 2sin²x = -3
3(1-sin²x) - 2sin²x = -3
3 -3sin²x - 2sin²x = -3
-5 sin²x = -6
sin x =√6/5
x = arc sin√6/5