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Given : vec A = hati + hatj +hatk and...

Given :
`vec A = hati + hatj +hatk and vec B =-hati-hatj-hatk` What is the angle between `(vec A - vec B) and vec A` ?

A

`0^(@)`

B

`180^(@)`

C

`90^(@)`

D

`60^(@)`

Text Solution

Verified by Experts

The correct Answer is:
A
`(a) A-B=(hati+hatj+hatk)-(-hati-hatj-hatk)`
`=2hatj+2hatj+2hatk=2A`
`i.e A-B and A" parallel".`
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