This site give the formula for finding the slope of the tangent line to a polar graph. The page offers step by step explanations and worked examples.

this lesson presents how to find a coordinate of an ordered pair that falls on a line with a given slope. It is 2 of 5 in the series titled "Finding a Coordinate When Given the Slope."

The examples presented here demonstrates finding the derivative of a function using "h" rather than "delta x" notation. Graphs are included as a visual aid.