(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 MicoArrafi
(sin x + cos x)(sin x - cos x)
= sin² x - sin x cos x + sin x cos x - cos² x
= sin² x - cos² x