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# very basic vector question watch

1. v = ( Vi )
( Vii )
write an expression for norm of v in terms of a suitable dot product...

as this all the information given in the question am I write in just inventing another vector x and saying that

norm (v) = v.x / norm (x) cos theta

where theta is angle between v and x??
2. (Original post by pic)
v = ( Vi )
( Vii )
write an expression for norm of v in terms of a suitable dot product...

as this all the information given in the question am I write in just inventing another vector x and saying that

norm (v) = v.x / norm (x) cos theta

where theta is angle between v and x??
You don't need to bring in another vector, this can be done in terms of the dot product of v with itself. So, try a few examples...what do you get when you take the dot product of a vector with itself?

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