Buktikan identitas berikut a. Cotan A + tan A = Sec A . Cosec A
Matematika
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Pertanyaan
Buktikan identitas berikut
a. Cotan A + tan A = Sec A . Cosec A
a. Cotan A + tan A = Sec A . Cosec A
1 Jawaban
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1. Jawaban bapakdr
= cos A/sin A + sin A/cos A
= (cos²A/sin A cos A) + (sin²A/sin A cos A)
= (cos²A + sin²A) / (sin A cos A)
= 1 / sin A cos A
= 1/sin A . 1/cos A
= cosec A . sec A