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vec A and vec B are two vectors and thet...

`vec A and vec B` are two vectors and `theta` is the angle between them. If `vec A. vec B=0,` then which one of the following options is worng ?

A

`vec A =0`

B

`vec B=0`

C

`theta =0^(@)`

D

`theta =90^(@)`

Text Solution

Verified by Experts

The correct Answer is:
C
`vec A cdot vec B = AB cos theta." Hence "vec A cdot vec B=0` means either `vec A =0" or "vec B =0" or " theta =90^(@)`
`therefore theta =0^(@)` is wrong. If `theta =0^(@)," then "vec A cdot vec B = AB`
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