(sin x+ cos x)(si x+cos x) =2 sin² x-1
Matematika
abdillah30032002
Pertanyaan
(sin x+ cos x)(si x+cos x) =2 sin² x-1
1 Jawaban
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1. Jawaban Anonyme
jawab
(sin x + cos x)(sin x + cos x) =2 sin² x + 1
ruaskiri
= sin² x + cos ² x + sin 2x
= sin² x + 1 - sin² x + sin 2x
= 1 + sin 2x