Unxande nephola

Iphuzu lingachazwa ngezindlela ezimbili. Kumakhodinethi angunxande, $P(x,\ y)$: $\displaystyle x$ uya eceleni, $\displaystyle y$ uya phezulu. Kumakhodinethi ephola, $P(r,\ \theta)$: ibanga $\displaystyle r$ ukusuka emsukeni, ne-engeli $\displaystyle \theta$. Ukusuka kunxande uye kuphola, $r=\sqrt{x^{2}+y^{2}}$, kanti $\displaystyle \theta = \tan^{-1}(y/x)$. Ukubuyela emuva, $x=r\cos\theta$, kanti $\displaystyle y = r\sin\theta$. Isibali senza kokubili ukuguqula, futhi sigcina nemiphumela: $\displaystyle r$ noma $\displaystyle x$ enkumbulweni X, no $\displaystyle \theta$ noma $\displaystyle y$ enkumbulweni Y.

▶ Buka lesi sinyathelo kwi-vidiyo (1:06:22)