berdasarkan gambar diatas , nilai Cos bantu dong plis

Trigonometri

P (x,y) = (12, -5)
x = 12
y = - 5
r = √x²+y²)
r = √(144+25) = √169= 13

x> 0 , y < 0 , θ dikuadran IV dan cos θ  > 0
cos θ = x/r = 12/13