Home
Class 12
MATHS
If the position vectors of A and B are h...

If the position vectors of A and B are `hati+3hatj-7hatk and 5hati-2hatj+4hatk`, then the direction cosine of AB along Y-axis is

A

`(4)/(sqrt162)`

B

`-(5)/(sqrt162)`

C

`-5`

D

11

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

If the position vectors of P and Q are (hati+3hatj-7hatk) and (5hati-2hatj+4hatk) , then |PQ| is

The position vectors of points A and B are hati+3hatj-7 hatk and 5hati-2hatj+4hatk respectively, then the direction cosine of bar(AB) along Y-axis is

If the position vectors of A and B respectively hati+3hatj-7hatk and 5 hati-2hatj+4hatk , then find AB

If the position vectors of P and Q be respectively hati+3hatj-7hatk and 5hati-2hatj+4hatk and vec(PQ)

If the position vectors of P and Q are hati+2hatj-7hatk and 5hati-2hatj+4hatk respectively, the cosine of the angle between PQ and Z-axis is

If the position vectors of P and Q are hati+2hatj-7hatk and 5hati-3hatj+4hatk respectively, the cosine of the angle between vec(PQ) and z-axis is

The position vectors of A and B are 2hati-9hatj-4hatk and 6hati-3hatj+8hatk respectively, then the magnitude of AB is

If the position vectors of the points A and B are hati+3hatj-hatk and 3hati-hatj-3hatk, then what will be the position vectors of the mid point of AB

If the position vectors of the points A and B are hati+3hatj-hatk and 3hati-hatj-3hatk , then what will be the position vector of the mid-point of AB

If ABCD is a parallelogram and the position vectors of A,B and C are hati+3hatj+5hatk, hati+hatj+hatk and 7 hati+7hatj+7hatk , then the poisitionn vector of D will be