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

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

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