Matematika

Pertanyaan

tan a + cot a = sec a cosec

1 Jawaban

  • Bab Trigonometri
    Matematika SMA Kelas X

    identitas

    tan a + cot a
    = (sin a / cos a) + (cos a / sin a)
    = (sin² a + cos² a) / (cos a . sin a)
    = 1 / (cos a . sin a)
    = (1/cos a) . (1/sin a)
    = sec a . cosec a

    terbukti

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