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Consider three vectors veca, vecb and ve...

Consider three vectors `veca, vecb and vecc`. Vectors `veca and vecb` are unit vectors having an angle `theta` between them For vector `veca,|veca|^2=veca.veca` If `veca_|_vecb and veca_|_vecc then veca||vecbxxvecc` If `veca||vecb, then veca=tvecb` Now answer the following question: If vecc` is as unit vector such that `veca.vecb=veca.vecc=0 and theta= (pi/6) then veca=` (A) `+-1/2(vecbxxvecc)` (B) `+-(vecbxxvecc)` (C) `+-2(vecbxxvecc)` (D) none of these

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