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Latihan Soal #12 [B] Identitas Trigonometri 11 (Lat Soal Diktat Smak 1), Buktikan ; (Tan A – 1) Per (Tan A + 1) . (Sin A + Cos A) Per (Sin A – Cos A) = 1

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Latihan Soal #12 [B] Identitas Trigonometri 11 (Lat Soal Diktat Smak 1), Buktikan ; (Tan A – 1) Per (Tan A + 1) . (Sin A + Cos A) Per (Sin A – Cos A) = 1