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April 6th, 2015, 02:31 AM  #1 
Senior Member Joined: Oct 2014 From: Complex Field Posts: 119 Thanks: 4  Finding a vector that is parallel to a plane
Hello, If I am given a vector u=8i+6j+7k. and I need to find another vector w that is parallel to the XZ plane and also perpendicular to the given vector u. I know that the XZ plane means that y=0. I also understand that for the vector to be perpendicular I need to find that the dot product should be 0. But I can't find out what to do exactly to find that vector. Thanks for your help 
April 6th, 2015, 03:57 AM  #2  
Math Team Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 408  Hello, noobinmath! Quote:
Your reasoning is correct.  
April 6th, 2015, 07:53 AM  #3 
Senior Member Joined: Oct 2014 From: Complex Field Posts: 119 Thanks: 4 
Thanks! ! !


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finding, parallel, plane, vector 
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