R rv498 New member Joined May 21, 2012 Messages 1 May 22, 2012 #1 153x^2+192xy+97y^2 = 225 cot(2θ) = (a-c)/b cot(2θ) = 7/24 then I am lost.. help please?
tkhunny Elite Member Joined Apr 12, 2005 Messages 11,322 May 22, 2012 #2 Why do you think you are lost? You have an expression where you can find the angle of rotation. Go ahead and find it!
Why do you think you are lost? You have an expression where you can find the angle of rotation. Go ahead and find it!
