Buktikan : 1. Cos A + Tg A Sin A = Sec A 2. 1/sin A - Sin A = Cos A Cot A
Matematika
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Pertanyaan
Buktikan :
1. Cos A + Tg A Sin A = Sec A
2. 1/sin A - Sin A = Cos A Cot A
1. Cos A + Tg A Sin A = Sec A
2. 1/sin A - Sin A = Cos A Cot A
1 Jawaban
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1. Jawaban Anonyme
Bab Trigonometri
Matematika SMA Kelas X
1] cos A + tan A . sin A = sec A
cos A + (sin A / cos A) . sin A = sec A
(cos² A + sin² A) / cos A = sec A
1/cos A = sec A
sec A = sec A
2] (1/sin A) - sin A = cos A . cot A
(1 - sin²)/sin A = cos A . cot A
cos² A / sin A = cos A . cot A
cos A . cos A / sin A = cos A . cot A
cos A . cot A = cos A . cot A