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Two vectors, both equal in magnitude, ha...

Two vectors, both equal in magnitude, have their resultant equal in magnitude of the either. Find the angle between the two vectors.

A

`60^(@) `

B

`90^(@)`

C

`105^(@)`

D

`120^(@)`

Text Solution

Verified by Experts

The correct Answer is:
4
`R= 2a cos (theta//2) rArr a = 2a cos (theta//2)`
`rArr cos (theta//2) = 1//2 rArr theta//2 = 60^(@) rArr theta = 120^(@)`
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