Question

Tolong ya no 23 .. cari jalannya gi mna sih .

Answer 1

R = √(3√2)² + (-3√6)²
r = √(9x2) + (9x6)
r = √18+54
r = √72
r = 6√2

tan θ = y/x = -3√6 / 3√2 = -√3 
tan √3 = 60° kalau -√3 = 180°-60°= 120° ( karena berada di kuadran 2)