he vectors `vec a, vec b,vec c, vec d` be are such that `(vec a times vec b) times (vec c times vec d)=0` and `P_1, P_2`

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Q 1387123087.     he vectors `vec a, vec b,vec c, vec d` be are such that `(vec a times vec b) times (vec c times vec d)=0` and `P_1, P_2` are two planes containing the pair of vectors `vec a, vec b` and `vec c, vec d` respectively, then the angle between the planes is ?
A

`frac{pi}{2}`

B

`frac{pi}{4}`

C

`frac{pi}{3}`

D

`0`

HINT


Solution
(Provided By a Student and Checked/Corrected by EXXAMM.com Team)

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