perhatikan gambar berikut. nilai sec teta =....

Bab Trigonometri
Matematika SMA Kelas X

A = (x,y) = (-3,4) di kuadran II

r = √(x² + y²)
r = √((-3)² + 4²)
r = √(9 + 16)
r = 5

sec α = r/x
sec α = 5/-3
sec α = -5/3

jawabannya A