Question 38The gradient of the line B is M1 and the gradient of the line CD is M2. The angle between lines AB and CD is:A.[m1-m2]/[1+m1m2]B.tan-1([m1-m2]/[m1+m2])C.tan-1([m1-m2]/[1+m1m2]D.tan-1([m1+m2]/[1+m1m2])Objective Show full explanation