Q .     A vector `\vec A` is rotated by a small angle `\Delta \theta` radians `(\Delta \theta < < 1)` to get a new vector `\vec B`. In that case ` |\vec B-\vec A|` is

JEE 2015 Mains 11 April
A

`|\vec A| (1-\frac {\Delta \theta^2}{2} )`

B

`0`

C

`|\vec A|\Delta \theta`

D

`|\vec B|\Delta \theta -|\vec A|`

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