Sistem koordinat polar: Perbedaan antara revisi

:<math>r = \sqrt{x^2 + y^2} \quad</math> (sebagaimana dalam [[teorema Pythagoras]] atau [[Euclidean norm]]), dan

:<math>\varphi = \operatorname{atan2}(y, x) \quad</math>,

:<math>\operatorname{atan2}(y, x) =

\begin{cases}

\end{cases}</math>

 

==Polar equation of a curve==

The equation defining an [[algebraic curve]] expressed in polar coordinates is known as a ''polar equation''. In many cases, such an equation can simply be specified by defining ''r'' as a [[function (mathematics)|function]] of ''φ''. The resulting curve then consists of points of the form (''r''(''φ''),&nbsp;''φ'') and can be regarded as the [[graph of a function|graph]] of the polar function ''r''.