(cos α+sin α)²=1+2 cos α sin α
Matematika
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Pertanyaan
(cos α+sin α)²=1+2 cos α sin α
1 Jawaban
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1. Jawaban Robinn
(cosx + sinx)² = 1 + 2sinxcosx
cos²x + 2sinxcosx + sin²x = 1 + 2sinxcosx
cos²x + sin²x + 2sinxcosx = 1 + 2sinxcosx
1 + 2sinxcosx = 1 + 2sinxcosx