Direction ratios of two lines are `a ,b ,ca n d1//b c ,1//c a ,1//a bdot` Then the lines are ______.

The direction ratios of a line are 1,-2,5 , find the direction cosines of the line.

If (a,a+b,a+b+c) is one set of direction ratios of the line joining (1,0,0) and (0,1,0), then find a set of values of a,b,c.

If (a,a+b, a+b+c) is one set of direction ratios of the line joining (1,0,0) and (0,1,0) then find a set of values of a , b , c .

If direction cosines of a line are (1)/(c),(1)/(c),(1)/(c)," then. "

A line L_(1) with direction ratios -3,2,4 passes through the point A(7,6,2) and a line L_(2) with directions ratios 2,1,3 passes through the point B(5,3,4). A line L_(3) with direction ratios 2,-2,-1 intersects L_(1) and L_(3) at C and D, resectively. The equation of the plane parallel to line L_(1) and containing line L_(2) is equal to

Vertices of a variable acute angled triangle A B C lies on a fixed circle. Also, a ,b ,ca n dA ,B ,C are lengths of sides and angles of triangle A B C , respectively. If x_1, x_2a n dx_3 are distances of orthocenter from A ,Ba n dC , respectively, then the maximum value of ((dx_1)/(d a)+(dx_2)/(d b)+(dx_3)/(d c)) is -sqrt(3) b. -3sqrt(3) c. sqrt(3) d. 3sqrt(3)

A line L_(1) with direction ratios -3,2,4 passes through the point A(7,6,2) and a line L_(2) with directions ratios 2,1,3 passes through the point B(5,3,4). A line L_(3) with direction ratios 2,-2,-1 intersects L_(1) and L_(3) at C and D, resectively. The lenth CD is equal to