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 September 4th, 2010, 10:53 PM #1 Newbie   Joined: Aug 2010 Posts: 12 Thanks: 0 vector algebra hello every one,my question is How many vectors there which are making equal angles with +ve x,y and z axis ? thanks in anticipation
 September 5th, 2010, 12:12 AM #2 Member   Joined: Jun 2010 Posts: 36 Thanks: 0 Re: vector algebra Only one vector.
 September 5th, 2010, 05:40 AM #3 Math Team   Joined: Dec 2006 From: Lexington, MA Posts: 3,267 Thanks: 407 Re: vector algebra I believe there are two:[color=beige] .[/color]$\nearrow\,\text{ and }\,\swarrow$
 September 5th, 2010, 06:42 AM #4 Senior Member   Joined: May 2008 From: York, UK Posts: 1,300 Thanks: 0 Re: vector algebra Well, clearly there are infinitely many vectors in $\mathbb{R}^3$ that have this property, but there is one up to multiplication by an arbitrary non-zero scalar, and two up to multiplication by an arbitrary positive scalar.

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