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Let vecA be vector parallel to line of i...

Let `vecA` be vector parallel to line of intersection of planes `P_1 and P_2` through origin. `P_1` is parallel to the vector `2hatj+3hatk and 4hatj-3hatk` and `P_2` is parallel to `hatj-hatk and 3hati-3hatj`, then the angle between the vectors `vecA` and `2hati+hatj-3hatk` is :

A

`pi/2`

B

`pi/4`

C

`pi/6`

D

`(3pi)/4`

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