(sin x + cos x) (sin x - cos x)
Matematika
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Pertanyaan
(sin x + cos x) (sin x - cos x)
1 Jawaban
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1. Jawaban AxlChuvie
(sin x + cos x)(sin x - cos x)
= sin² x - sinxcosx + sinxcosx - cos²x
= sin²x - cos²x