$\"\"$

The rectangular equation is $\"\"$ .

The graph of the equation $\"\"$ is a circle.

The radius of the circle is $\"\"$ .

To find the polar form of this equation replace $\"\"$ with $\"\"$ and $\"\"$ with $\"\"$ .

Consider $\"\"$ .

Substitute the corresponding values in the above equation.

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Pythagorean identity $\"\"$ .

$\"\"$ .

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Evaluate the function for several values of $\"\"$ in its domain.

Graph the function $\"\"$ .

Graph :

$\"\"$

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Graph of the function $\"\"$ .

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