Let,a,b,c;p,q,r;l,m,n are the d.c.of three mutually perpendicular straight lines.Prove that d.c.of a straight line which generate equal angle with these straight line will be a+p+l,b+q+m,c+r+n.

Let,a,b,c;p,q,r;l,m,n are the d.c.of three mutually perpendicular stra

1.	Let,a,b,c;p,q,r;l,m,n are the d.c.of three mutually perpendicular straight lines.Prove that d.c.of a straight line which generate equal angle with these straight line will be a+p+l,b+q+m,c+r+n.
Answer» Let,a,b,c;p,q,r;l,m,n are the d.c.of three mutually perpendicular straight lines.Prove that d.c.of a straight line which generate equal angle with these straight line will be a+p+l,b+q+m,c+r+n.