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maka a + b i = r ( cos ⁡ θ + i sin ⁡ θ ) {\displaystyle a+bi=r(\cos \theta +i\sin \theta )} Untuk mempersingkat penulisan, bentuk r ( cos ⁡ θ + i sin ⁡ θ...

x = r cos ⁡ θ {\displaystyle x=r\,\cos \theta \quad } y = r sin ⁡ θ {\displaystyle y=r\,\sin \theta \quad } ∂ ( x , y ) ∂ ( r , θ ) = ( cos ⁡ θ − r...

( x ) = cos ⁡ ( x ) . {\displaystyle {\frac {d}{dx}}\sin(x)=\cos(x).} d d x cos ⁡ ( x ) = − sin ⁡ ( x ) . {\displaystyle {\frac {d}{dx}}\cos(x)=-\sin(x)...