求直线xcosA+ √3y-2=0的倾斜角α的取值范围xcosA+ √3y-2=0→√3y=-xcosA+2→y=-(cosA/√3)x+2/√3→tanα=-(cosA/√3)-1≤cosA≤1→=-1/√3≤-(cosA/√3)≤1/√3→-1/√3≤tanα≤1/√3→0≤倾斜角α≤π/6或5π/6...