Matematika

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tolong dong bsk dikumpulin!

makasih
tolong dong bsk dikumpulin! makasih

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1 Jawaban

  • (Tan A - 1)/(Tan A + 1)
    = ((sin A)/(cos A) - 1) / ((sin A)/(cos A) + 1) ...... kali (cos A)/(cos A)
    = (sin A - cos A)/(sin A + cos A)
    = (1/(cosec A) - 1/(sec A)) / (1/(cosec A) + 1/(sec A))
    = [(sec A - cosec A)/(cosec A sec A)] / [(sec A + cosec A)/(cosec A sec A)]
    = (sec A - cosec A)/(sec A + cosec A)

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