You are given the polar curve r = cos(θ) + sin(θ)a) list all of the points (r,θ) where the tangent line is horizontal. in entering your answer, list the points starting with the smallest value of and limit yourself to (r > or equal to 0) and θ: [0, 2pi] if two or more points share the same value of r, list those starting with the smallest value of θ. point 1 (r,θ): ? point 2 (r,θ): ? point 3 (r,θ): ? b) repeat this with a tangent vertical line