Unxande → iphola, ikhwadranti yesithathu

Iphoyinti elino-x\displaystyle x no-y\displaystyle y abanegethivu: x=−3\displaystyle x = -3, y=−2.5\displaystyle y = -2.5. Cindezela u-on C, u-neg, 3, nekhoma, u-neg futhi, bese uthayipha 2.5. Bese u-second F no nokuya ku-r theta. Isikrini sibonisa r: 3.905124838 θ: −140.1944289 amadigri. u-recall, u-X kunika r\displaystyle r: 3.905124838. Futhi u-recall, u-Y kunika θ\displaystyle \theta: −140.1944289. I-engeli inegethivu: ilinganiswa ngokuhamba kwewashi ukusuka ku-eksisi ka-x\displaystyle x ephozithivu, futhi isibali siyigcina phakathi kuka-−180∘\displaystyle -180^{\circ} no-180∘\displaystyle 180^{\circ}.