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February 3rd, 2011, 06:52 AM   #1
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Angle between two planes, urgent!

The task is sounds as following:
A plane (alpha) goes has the equation 2x+y+2z-1=0
Another plane (beta) is parallel with the vectors [1,1,2] and [2,-1,5].
Find the angle between the planes.

At the moment, I have really no idea how I should solve this, so if someone could point me in the right direction, I would be very happy.
Thanks in advance, Chris.
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February 3rd, 2011, 08:14 AM   #2
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Re: Angle between two planes, urgent!

Allright, well I solved this myself, so never mind!
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February 3rd, 2011, 09:02 AM   #3
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Re: Angle between two planes, urgent!

Hello, Skovisen!

You solved it . . . Good for you!


Quote:





Here's my approach . . .







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February 3rd, 2011, 10:54 AM   #4
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Re: Angle between two planes, urgent!

Exactly what I did myself! Just took me some time to figure it out, but turned out to be not as hard as I first thought.
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