ArcTan[(√6)/(-√2)] = 120°
√((-√2)^2 + (√6)^2) = √8 = 2√2
Your polar coordinates are (2√2, 120°).
√((-√2)^2 + (√6)^2) = √8 = 2√2
Your polar coordinates are (2√2, 120°).
