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If |vecP+vecQ|=|vecP|+|vecQ|. The angle ...

If `|vecP+vecQ|=|vecP|+|vecQ|`. The angle between the vectors `vecPandvecQ` is

A

`0^(@)`

B

`180^(@)`

C

`60^(@)`

D

`90^(@)`

Text Solution

Verified by Experts

Square on both sides and the resultant becomes
`P^(2)+Q^(2)+2PQcostheta=P^(2)+Q^(2)+2PQ`
`costheta=1" "0-0^(@)`
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