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If vec a , vec b ,a n d vec c are such ...

If ` vec a , vec b ,a n d vec c` are such that `[ vec a vec b vec c]=1, vec c=lambda vec axx vec b ,` angle, between ` vec aa n d vec b` is `(2pi)/3,| vec a|=sqrt(2),| vec b|=sqrt(3)a n d| vec c|=1/(sqrt(3))` , then the angel between ` vec aa n d vec b` is `pi/6` b. `pi/4` c. `pi/3` d. `pi/2`

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