If A(2, -1, 4), B(0, 1, 5), C(4, 3, 5), D(6, 4, 3) then the projection of `bar(AB) " on " bar(CD)` is

If A (4, 3, 5), B (6, 4, 3), C (2, -1, 4), D (0, 1, 5) then the projection of bar(AB) " on " bar(CD) is

For A(1, -2, 4), B(5,-1,7),C(3,6,-2), D(4,5,-1) , the projection of bar(AB)" on " bar(CD) is ______

If A = (-2, 3, 4), B = (-4, 4, 6), C = (4, 3, 5), D = (0, 1, 2) then the projection of AB on CD is

If A = (1,-1,0), B=(1,2,1), C=(2,3,0) and D=(0,1,t). Be four points. If the projection of bar(AB) " on " bar(CD)" is equal to that of " bar(CD) " on " bar(AB) , then find t.

If P(3,4,5), Q(4,6,3), R(-1,2,4), S(1,0,5) then find the projection bar(RS) on bar(PQ)

If A, B, C, D are the points (2, 3, -1), (5, 2, 3), (4, 3, -5) and (-2, 1, -8) respectively, then find the projection of AB on CD.

A(1, -2, 4), B(5, -1, 7), C(3, 6, -2) and D(4, 5, -1) are given vectors. Then the projection of vec(AB) on vec(CD) is ……………

If A-=(3,4-2),B-=(1,-1,2),C-=(0,3,2) and D-=(3,5,6) , then the angle between bar(AB) and bar(CD) is