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If the angle between the planes bar ...

If the angle between the planes `bar r .(m hati -hatj+2hatk)+3=0 and bar r.(2hati -m hatj - hatk )-5=0 ` is `(pi)/(3)` , then m=

A

2

B

`+-3`

C

`3`

D

`-2`

Text Solution

Verified by Experts

The correct Answer is:
C
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