If |veca+ vecb| lt | veca- vecb|, then t...

If `|veca+ vecb| lt | veca- vecb|`, then the angle between `veca and vecb` can lie in the interval

A

`(-pi//2,pi//2)`

B

`(0,pi)`

C

`(pi//2,3pi//2)`

D

`(0,2pi)`

Verified by Experts

The correct Answer is:

C

`|a+b| lt |a-b|`
`implies (pi)/(2) lt theta lt (3pi)/(2)`.

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