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The resultant R of vector P andQ is perp...

The resultant R of vector P andQ is perpendicular to P and R=P both , then angle betwwen `|P|and|Q| `is

A

`45^(@)`

B

`135^(@)`

C

`120^(@)`

D

All of these

Text Solution

Verified by Experts

The correct Answer is:
B
(b ) We have ,Q `sin theta =P`
and Q `ccos theta=R=P`

Dividing these two equatin we get ,
`tantheta=1`
`therefore theta =45^(@)`
` therefore ` Angle between P and Q is `135^(@)`
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