Precalculus - Polar and Rectangular Equations

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Step-by-step tutorial with 3 examples for each conversion.
Polar equation to rectangular equation.
Rectangular equation to polar equation.
Polar to rectangular: x=r cos⁡θ and y=r sin⁡θ
Rectangular to polar: θ=tan^(-1)⁡(y/x) and r^2=x^2+y^2
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