# Yahoo Web Search

1. ### How do I find the rotation matrix that rotates the complex number, x + yi, 30 degrees counterclockwise?

The matrix for xy plane counterclockwise rotation is [ cos(theta) -sin(theta) ] [ sin(theta) cos(theta) ] so since the value of theta...

2 Answers · Science & Mathematics · 13/02/2010

2. ### How do you read a rotation matrix ?

...x' = 0x - 1y y' = 1x + 0y or x' = -y y' = x But rotation matrices only rotate around (0, 0). Those would be the operations to rotate around...

2 Answers · Science & Mathematics · 18/08/2012

3. ### How do you diagonalize a matrix to then find the rotation matrix ?

First, an n x n matrix is diagonalizable if and only if there are n linearly independent ...be the same up to scalar multiplication. All you need is the transformation matrix for the diagaonlization. This is constructed by setting...

2 Answers · Science & Mathematics · 23/08/2012

4. ### abitrary axis for 2D matrix Rotation ?

... making the matrices compatible - you can't have a 2x2 rotation matrix - you need one that handles the same coordinate system that your translation...

2 Answers · Science & Mathematics · 21/05/2009

5. ### Help finding a rotation inducing matrix ?

The matrix that you used was for rotation - you want to use a matrix that induces reflection. For example, lets...

1 Answers · Science & Mathematics · 17/12/2012

6. ### What is the answer to the rotation matrix multiplied by Aɸ?

... the matrix is not given, there is no way to evaluate the rotation matrix multiplied by Aɸ... The solution exists if and only...

2 Answers · Science & Mathematics · 14/02/2013

7. ### Rotation matrices - measuring theta?

If the rotation is about the x-axis, then theta will represent the degree of the rotation in the y-z plane, i.e. the same value as if you just had a 2D- rotation in the y-z plane.

1 Answers · Science & Mathematics · 07/03/2013

8. ### How do I create a rotation matrix to rotate along an offsetted axis?

... the coordinates of the center of mass. Then apply the normal rotation matrix (don't know if you know them, they're here: http://en.wikipedia.org/wiki...

1 Answers · Science & Mathematics · 21/02/2013

9. ### abitrary axis for 2D matrix Rotation ?

...the translation matrix is (1 0 Px) (0 1 Py) (0 0 1 ) and the rotation matrix is (cos Ø, -sin Ø, 0) (sin Ø, cos Ø, 0...

2 Answers · Computers & Internet · 19/12/2007

10. ### What is the Matrix Rotation ?

... that you want to rotate the figure 90° counterclockwise. Recall that the rotation matrix is: R = [cos(θ) -sin(θ)] [sin(θ) cos(θ)] If θ = 90...

1 Answers · Science & Mathematics · 10/12/2012