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If veca and vecb are two non collinear v...

If `veca and vecb` are two non collinear vectors and `vecu=veca-(veca.vecb)vecb and vecv=vecaxxvecb` then `|vecv|` is (A) `|vecu|` (B) `|vecu|+|vecu.vecb|` (C) `|vecu|+|vecu.veca|` (D) none of these

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