cos B + 1+ sin B = 2 sec B 1+sin B cos B
Matematika
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Pertanyaan
cos B + 1+ sin B = 2 sec B
1+sin B cos B
1 Jawaban
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1. Jawaban rinarizles
cos²b + (1+sin b)(1+sin b) = 2 sec b
(1+ sin b) (cos b)
cos²b + 1 + sin b + sin b + sin²b = 2 sec b
(1+ sin b) (cos b)
1 - sin²b +1 + 2 sin b + sin²b = 2 sec b
(1+ sin b) (cos b)
2 + 2 sin b = 2 sec b
(1+ sin b) (cos b)
2(1+ sin b) = 2 sec b
(1+ sin b) (cos b)
2 (1) = 2 sec b
(cos b)
2 sec b = 2 sec b (terbukti)