acute angle between the pair of lines 2x^2+5xy+2y^2+3x+3y+1=0 Share with your friends Share 0 Anuradha Sharma answered this Dear Student, tanθ= 2h2-aba+b=2522-2×22+2=12×254-4=164= 1So tanθ=tan45 So angle is 45 degreeRegards -2 View Full Answer