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The polar equation is and .
If the point has Cartesian coordinates and polar coordinates , then and .
Substitute in polar coordinates.
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The slope of the tangent line is derivative of the function.
Apply chain rule of derivatives : .
First find .
Consider .
Apply derivative on each side with respect to .
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Find .
Consider .
Apply derivative on each side with respect to .
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Substitute and .
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The slope of the tangent line is derivative of the function at the point.
The slope of the tangent line at .
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The slope of the tangent line is .
The slope of the tangent line is .
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