Question

If the direction cosines of two lines are
connected by the relation 1+ m – n=0 and
4lm + mn – 3ln=0, then the acute angle
between the lines is​

Answer 1

Answer:

If the direction cosines of two lines are

connected by the relation 1+ m – n=0 and

4lm + mn – 3ln=0, then the acute angle

between the lines is