Sec A - cos A = tg A . sin A buktikan identitas trigonometri
Matematika
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Pertanyaan
Sec A - cos A = tg A . sin A buktikan identitas trigonometri
1 Jawaban
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1. Jawaban idznizhahrina
1/cos a -cos a
=(1-cos^2 a)/cos a
=sin^2 a/cos a
=(sin a/cos a)*sin a
=tan a * sin a
(Terbukti)