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Trigonometri


A. Perbandingan Trigonometri

Teori Pythagoras

Teori Pythagoras
r2 = x2 + y2



Perbandingan Trigonometri







  • sin θ = depan/miring = y/r
  • cos θ = samping/miring = x/r
  • tan θ = depan/samping = y/x
  • cosec θ = 1/sin θ = r/y
  • sec θ = 1/cos θ = r/x
  • cotan θ = 1/tan θ = x/y


B. Nilai - Nilai Sudut Istimewa

Nilai perbandingan trigonometri sudut istimewa dapat di cari dengan segitiga siku-siku istimewa.
0°
30°
45°
60°
90°
sin
0
1/2
1/2√x2
1/2√x3
1
cos
1
1/2√x3
1/2√x2
1/2
0
tan
0
1/2√x3
1
√x3
∞

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