(Sin x - cos x )kuadrat=1-2 sin x cos x
Matematika
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Pertanyaan
(Sin x - cos x )kuadrat=1-2 sin x cos x
1 Jawaban
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1. Jawaban Anonyme
jawab
(sin x - cos x)² =
= sin² x - 2 sin x cos x + cos² x
= (sin² x + cos² x) - 2 sin cos x
= 1 - 2 sin x cos x