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The angle between the planes barr*(hati ...

The angle between the planes `barr*(hati - 2hatj + 3hatk) + 4 = 0` and `barr *(2hati + hatj - 3hatk) = 0` is

A

`(pi)/(2)`

B

`cos^(-1)((3)/(4))`

C

`cos^(-1)((9)/(14))`

D

`(pi)/(3)`

Text Solution

Verified by Experts

The correct Answer is:
C
`cos^(-1)((9)/(14))`
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