TOLONG BANTU Buktikan : a). 1 - sin theta / cos theta = cos theta / 1 - sin theta b). sec A - csc A / sec A + csc A = tg A - 1 / tg A + 1 c). tg A - sin A / sin pangkat 3 A = sec A / 1 - cos A bagaimana cara detail mengerjakannya ? tolong bantu jawab ya yang mana saja yang bisa kalian jawab
subebe
A. soal kurang jelas b. (sec A - csc A) / (sec A +csc A) = (tan A -1) / (tan A + 1) (1/cos A - 1/sin A) / (1/cos A + 1/sin A) = (sin A/cos A - coa A/cos A) / (sinA/cosA + cos A/cos A) ((sin A- cos A) / cos A sin A) / ((sin A + cos A)/cos A sin A) = ((sin A -cosA) / cosA ) / ((sin A+ cosA )/cos A) (sin A - cos A) / (sin A + cos A) = (sin A - cos A) / (sin A + cos A) terbukti
b. (sec A - csc A) / (sec A +csc A) = (tan A -1) / (tan A + 1)
(1/cos A - 1/sin A) / (1/cos A + 1/sin A) = (sin A/cos A - coa A/cos A) / (sinA/cosA + cos A/cos A)
((sin A- cos A) / cos A sin A) / ((sin A + cos A)/cos A sin A) = ((sin A -cosA) / cosA ) / ((sin A+ cosA )/cos A)
(sin A - cos A) / (sin A + cos A) = (sin A - cos A) / (sin A + cos A) terbukti