If bara = 3bari - 4barj +5bark, barb = 2...

If `bara = 3bari - 4barj +5bark, barb = 2bari+3barj-bark ," then the angle between " bara and barb` is

A

`pi+cos^(-1)(11/(10sqrt7))`

B

`pi-cos^(-1)(11/(10sqrt7))`

C

`cos^(-1)(11/(10sqrt7))`

D

`-cos^(-1)(11/(10sqrt7))`

Text Solution

Verified by Experts

The correct Answer is:

B

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AAKASH SERIES-DOT PRODUCT OF TWO VECTORS-EXERCISE - I

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