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A vector of length l is turned through t...

A vector of length l is turned through the angle `theta about its tall. What is the change in the position vector of its head ?

A

`l cos (theta//2)`

B

`2l sin(theta//2)`

C

`2l cos(theta//2)`

D

`l sin (theta//2)`

Text Solution

Verified by Experts

The correct Answer is:
2
If `P=Q=R and vecP+ vecQ = vecR`
`theta_1 = 60^(@)`

if `P=Q= R and vecP + vecQ + vecR=0`
`theta_2 = 120^(@)`

`theta_1 = (theta_2)/(2)`
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