Re: [Math4u] Re: Given two 3-d vectors, determine angle

Hi,
The other angle (between 0 and 360)=360-angle between
the vectors.
Sanjiva
--- sexyazn5tud <sexyazn5tud@yahoo.com> wrote:

> Thanks for the reply! Is there anything I can do to
> calculate the
> angle from 0 to 360?
>
> Imagine this:
> ^ v2
> /
> /
> ---> v1 45 degrees
>
> ---> v1 -45 degrees
> \
> \
> v v3
>
> The dot product is the SAME. I need to be able to
> determine if it is
> 45 degrees CW from v1 or 45 degrees CCW from v1.
>
> Any ideas?
>
> --- In Math4u@yahoogroups.com, sanjiva dayal
> <sanjivadayal@...> wrote:
> >
> > Hi,
> > Angle between two vectors is defined to be between
> 0
> > and 180 only. Angle between 0 an 180 obtained by
> dot
> > product is the right answer.
> > Sanjiva
>
>

Sanjiva Dayal, B.Tech.(I.I.T. Kanpur)
Address:A-602, Twin Towers, Lakhanpur, Kanpur-208024, INDIA.
Phones:+91-512-2581532,2581426.
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Business email:sanjivadayal@yahoo.com
Personal email:sanjivadayal@hotmail.com

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