यदि `A(3,4,5), B(4,6,3),C(-1,2,4)` तथा `D(1,0,5)` चार बिन्दु है, तब रेखा AB व CD के मध्य कोण ज्ञात कीजिए।

If A(3,4,5),B(4,6,3),C(-1,2,4) and D(1,0,5) are such that the angle between bar(DC) and bar(AB) is theta then cos theta=

If A(3, 4, 5), B(4, 6, 3), C(-1, 2, 4) and D(1, 0, 5) are such that the angle between the lines bar(DC) " and "bar(AB) " is " theta " then " costheta=

If A, B, C, D are the points (3,4,5),(4,6,3),(-1,2,4) and (1,0,5) , find the angle between C D and A B

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

If A=[(1,2,8)],B=[(4),(5),(6)] , and C=[(0,2,0)] and D=[(5),(2),(4)] , then AB + CD is equal to

Using vectors show that the points A(-2,3,5), B(7,0,-1), C(-3,-2,-5) and D(3,4,7) are such that AB and CD intersect at the point P(1,2,3).

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

यदि A= -(2x+3) , B= -3(x-2) तथा C=-2x+7 है। तब K का मान ज्ञात करो, यदि (A+B+C)=Kx