ρcosθ+ρsinθ=0 tanθ=-1
θ=3π/4能写下步骤吗多谢！ρcosθ+ρsinθ=0 ρsinθ =-ρsinθsinθ /cosθ=-1tanθ=-1tan(3π/4)=-1 直角坐标系方程x+y=0化为极坐标方程为 θ=3π/4