11. Given that sin(x+y) 2x, find the equation of the tangent line at the point (0, m). 12. Find the equation of the tangent and normal lines to the curve of: .zsinY+2xy=2x at the point 1, 2 dy 13. Let x +5y=3x2y _ Find using implicit differentiatiom 14. For the equation x + y 2y 3 Find the equation of the normal line at the point (2, 1). (5)