Buktikan ! cos A / 1+sin A = 1-sin A / cosA
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Buktikan !
cos A / 1+sin A = 1-sin A / cosA
cos A / 1+sin A = 1-sin A / cosA
1 Jawaban
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1. Jawaban Anonyme
cos/(1 + sin)
= cos/((cos/cos) + sin)
= cos / ((cos + sin cos)/cos)
= cos²/(cos(1 + sin))
= (1 - sin²)/(cos(1 + sin))
= (1 - sin)(1 + sin)/(cos(1 + sin))
= (1 - sinA)/cosA, trbukti