(sinx+cosx)^ + (sinx-cosx)^
Matematika
uswah13
Pertanyaan
(sinx+cosx)^ + (sinx-cosx)^
1 Jawaban
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1. Jawaban Robinn
(sinx + cosx)² + (sinx - cosx)²
= sin²x + 2sinxcosx + cos²x + sin²x - 2sinxcosx + cos²x
= sin²x + cos²x + sin²x + cos²x
= 1 + 1
= 2