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    Hi Everyone,

    Quick question regarding vector cross products.

    Im looking at the question:

    The vector a points east with magnitude 2, and the b points north-west with magnitude 3. Wha is the magnitude and direction of c = a x b?

    Now the mangitude was easy to calculate, 3*(2^1/2). However im having trouble with the direction.

    We've been taught the right hand rule, but does that only work if vectors a and b are perpendicular and your in a 3D coordinate system?

    The answer is 'points up'... very specific, so im guess that means north?

    Or would you in a case like this when a and b are not perpendicular would you use geometry to calculate which direction the cross product would be in?

    Cheers for any help guys
 
 
 
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