4. Let r = f (0) = cos(20). (a) Find dy dx (b) Determine the equation of the tangent line to r = f(0) at 0 = = 6Section 12.2!123 Activity Polar Curves and Derivatives of Polar Curves 1. Consider the point in given in rectangular coordinates: P(2, 3) . Determine the equivalent polar coordinates of the point P. 2. Given the point (r, 6') = (3, 27:3) in polar coordinates, give two more points with different values of r and 6', which give the equivalent location in the polar plane. 3. If x = p09) andy = 1909) , nd the correct formula for :y in terms of p and q. x