TRIGONOMETRI

Perbandingan trigonometri sudut pada segitiga ABC yang mempunyai siku-siku di B.

Nilai perbandingan trigonometri sudut-sudut istimewa.

Hubungan nilai perbandingan trigonometri sudut di berbagai kuadran.

  1. Kuadran I (semua bernilai positif)
  • Sin(90o-q) = cos q
  • Cos (90o-q) = sin q
  • Tan (90o-q) = cotan q
  1. Kuadran II (sinus bernilai positif)
  • Sin(180o-q) = sin q
  • Cos (180o-q) = -cos q
  • Tan (180o-q) = -tan q
  1. Kuadran III (tangen bernilai positif)
  • Sin(180o+q) = -sin q
  • Cos (180o+q) = -cos q
  • Tan (180o+q) = tan q
  1. Kuadran IV (kosinus bernilai positif)
  • Sin(360o-q) = -sin q
  • Cos (360o-q) = cos q
  • Tan (360o-q) = -tan q

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