Homework Help: trig

Posted by Sam on Monday, April 30, 2012 at 9:15pm.

Determine whether the vectors are parallel, perpendicular or neither.
1) v = (4,1), w = (1,-4)
2) v = (2,3), w = (4,6)
3) v = (2,3), w = (3,-3)
Please and thanks!

trig - Reiny, Monday, April 30, 2012 at 9:30pm
to be perpendicular, the dot product must be zero
to be parallel, one must a scalar multiple of the other.
The question is very easy.
trig - Sam, Monday, April 30, 2012 at 10:12pm
I don't understand how to fnd it though Reiny :( perhaps you could help?

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