jika sin teta=12/13 dan 0°

Kelas 10 Matematika
Bab Trigonometri

0° < θ < 90°

sin θ = 12/13 →y/r

x = √(r² - y²)
x = √(13² - 12²)
x = √(169 - 144)
x = √25
x = 5

1] cos θ = x/r
cos θ = 5/13

2] tan θ = y/x
tan θ = 12/5