Find all angles on the interval at which the tangent line to the graph of the polar equation is horizontal.
Express the polar equations parametrically (in terms ofx and y) and calculate the slope of the polar equation.
The tangent lines to the polar graph are horizontal when the numerator of this derivative is equal to 0. In other words, at .The video may take a few seconds to load. Having trouble Viewing Video content? Some browsers do not support this version - Try a different browser.