You are given the parametric equations 2 cos 0 y sin 20 a List all of the points x y where the tangent line is horizontal In entering your answer list the points starting with the smallest value of x If two or more points share the same value of x list those points starting with the smallest value of y If any blanks are unused type an upper case N in them Point 1 x y Point 2 x y Point 3 x y Point 4 x y Point 5 x y Point 6 x y b List all of the points x y where the tangent line is vertical In entering your answer list the points starting with the smallest value of x If two or more points share the same value of a list those points starting with the smallest value of y If any blanks are unused type an upper case N in them Point 1 x y Point 2 x y Point 3 x y Point 4 x y Point 5 x y