To convert this the polar to rectangular calculator use the formula: X = r ∗ c o s θ, y = r ∗ s i n θ So, substitute the values x = 2 ∗ c o s ( 9), y = 2 ∗ s i n ( 9) Therefore, the cartesian to polar Click here: Polar Coordinates Calculator Polar Coordinates Calculator Calculus: Integral with adjustable bounds. example. Calculus: Fundamental Theorem of Calculus,Click here: Polar Coordinates Calculator