# Yahoo Web Search

1. ### Write out the matrix A for the rotation about the angle pi/2 in R^2?

... the first few lines on this link: http://en.wikipedia.org/wiki/ Rotation _ matrix I think it is straight-forward after this. So I am...

1 Answers · Science & Mathematics · 15/03/2014

2. ### Linear Algebra - Prove that the rotation matrix A_ϴ(theta) is an orthogonal matrix .?

... sinΘ = 0...do you know the conditions for orthogonality of a matrix ?

1 Answers · Science & Mathematics · 28/12/2010

3. ### Re-orthogonalizing a rotation matrix ?

http://mathworld.wolfram.com/RotationMatrix.html

1 Answers · Science & Mathematics · 19/03/2009

4. ### How does one diagonalize a rotation matrix like the following?

... are... cosθ ± i · sinθ i think the diagonalizing matrix is not difficult to get by this time... plug in the two eigenvalues...

1 Answers · Science & Mathematics · 10/12/2007

5. ### Rotation Matrix .........?

(cos 25 ........- sin 25 (sin 25 .........cos 25) If you want approximations, use the calculator, and make sure it is on degrees. But cos 25 does not have an exact value in nice closed form.

2 Answers · Science & Mathematics · 04/03/2011

6. ### I need help with this matrices question?

'what do you want to ask actually? ' Rotation with matrices ?

1 Answers · Science & Mathematics · 05/03/2010

7. ### How can I correctly represent multiple rotations in a matrix or quaternion?

Use a 4xmxn matrix mat where mat = mXn matrix of yaw position mat = mXn matrix of pitch...an easy way to check your data, write a function that prints the entire matrix and print it frequently during testing.

2 Answers · Computers & Internet · 19/09/2007

8. ### Matrices ?!?!?!?!?!?

I assume that you mean the rotation to be counterclockwise. If you have a linear transformation T: R^2 -> R^2 and you want its standard matrix , do the following: (1) Apply T to the following vector...

1 Answers · Science & Mathematics · 23/05/2007

9. ### 3x3 matrix for transformation and a single matrix to accomplish all three transformations?

... rotations we adapt the 2D rotation matrix { {cost,−sint}, {sint,cost} } to rotation about each of the...0,−1/√2,/√2} } Here’s the composite matrix http://www.wolframalpha.com/input/?i=%7B+%7B1...

3 Answers · Science & Mathematics · 14/05/2012

10. ### Find the 2 by 2 matrix that represents an anticlockwise rotation of 90° about the origin?

Try using the rotation matrix [cos t -sin t] [sin t cos t] with t = 90°. I hope this helps!

1 Answers · Science & Mathematics · 11/09/2012