The direction cosines of line joining `(1,-1,1) and (-1,1,1)` are (A) `2,-2,0` (B) `1,-1,0` (C) `1/sqrt(2)-1/sqrt(2),0` (D) none of these

Find the direction cosines of the line joining the points (1,-1,0) and (2, 1, 3).

Write the direction-cosines of the line joining the points (1, 0, 0) and (0, 1, 1).

The direction cosines of any normal to the xy-plane are (A) 1,0,0 (B) 0,1,0 (C) 1,1,0 (D) 0,01

If the direction cosines of a straighat line are k,k,k the (A) kgt0 (B) 0ltklt1 (C) k=1 (D) k=1/sqrt(3) or -1/sqrt(3)

The direction cosines of x-axis are (A) 0,0,1 (B) 1,0,0 (C) 0,1,0 (D) 0,1,1

If the direction cosines of a line are 1/c,1/c,1/c rthen (A) c.0 (B) 0ltclt1 (C) c=+-sqrt(3) (D) cgt2

Find the direction cosines of the vector joining the points A(1, 2, -3) and B(-1, -2, 1) directed from A to B .

Find the direction cosines of the vector joining the points A(1, 2, 3) and B(1, 2, 1) , directed from A to B.

Complete solution set of tan^2(sin^(-1)x)>1 is (a) (-1,-1/(sqrt(2)))uu(1/(sqrt(2)),1) (b) (-1/(sqrt(2)),1/(sqrt(2)))~{0} (c) (-1,1)~{0} (d) none of these

The length of projection of the line segment joinint (3,-1,0) and (-3,5,sqrt(2)) on a line with direction cosiens 1/2,1/2,1/sqrt(2) is (A) 1 (B) 2 (C) 3 (D) 4