Identitas trigonometri. (sin B + cos B)² + (sin B - cos B)²=
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Pertanyaan
Identitas trigonometri.
(sin B + cos B)² + (sin B - cos B)²=
(sin B + cos B)² + (sin B - cos B)²=
1 Jawaban
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1. Jawaban diditsatriyadiox8ng4
(sin B + cos B)² + (sin B - cos B)²=
(sin² B + 2 sin B cos B + cos² B) + (sin² B - 2 sin B cos B + cos² B) =
2sin² B + 2cos² B = 2(sin² B + cos² B) = 2 x 1
= 2