Show that A.(B+C)=A.B+A.C using anything but the coordinate definition of the dot product. Any ideas? Thanks
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Originally Posted by billa Show that A.(B+C)=A.B+A.C using anything but the coordinate definition of the dot product. Any ideas? Thanks Use that definition.
I tried to use that, but couldn't. I know I need to show that |A||B+C|cos(theta)=|A||B|cos(a1)+|A||C|cos(a2) but I can't come up with any relationships between the angles (or anything else for that matter).
Last edited by billa; May 16th 2009 at 01:54 PM. Reason: it was confusing
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