Tentukn koordinat cartesius dari 8, 3π/4

Convert Polar Coordinate to Cartesian Coordinate.

(r, θ) = (x, y)
x = r cos θ = 8 cos 3π/4 = -4√2
y = r sin θ = 8 sin 3π/4 = 4√2
Cartesian coordinate from (8, 3π/4) is (-4√2, 4√2).