Matematika

Pertanyaan

cos alfa ( 1 - tg alfa ) = cos alfa - sin alfa

1 Jawaban

  • Cosx (1-tanx) = cosx - sinx
    Cosx - cosxtanx = cosx - sinx
    Cosx - cosx(sinx/cosx) = cosx - sinx
    Cosx - sinx = cosx - sinx
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