## Polar Derivative, Coordinates & Function

First Derivative: The first derivative dydx d y d x of a polar function r=f() r = f ( ) is given by dydx=sin()drd+rcos()cos()drd-rsin() d y d x = sin

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## Polar Coordinates

The polar derivative generalizes the usual derivative to polar coordinates. In other words, the derivative rules you used in elementary calculus only work in

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## Polar derivatives

Find the equation of the tangent line to the curve at . We start by computing the derivative in rectangular coordinates. Recall that. Consequently,. and