# Thread: confused on transformation matrices!

1. ## confused on transformation matrices!

2. Originally Posted by pyrosilver

You're expected to be familiar with the various standard transformation matrices, including the one for rotation in an anti-clockwise direction by an angle $\displaystyle \theta$.

So I suggest you look up the rotation matrix in your notes or textbook and then determine the angle $\displaystyle \theta$ that gives this particular matrix.

3. Originally Posted by mr fantastic
You're expected to be familiar with the various standard transformation matrices, including the one for rotation in an anti-clockwise direction by an angle $\displaystyle \theta$.

So I suggest you look up the rotation matrix in your notes or textbook and then determine the angle $\displaystyle \theta$ that gives this particular matrix.
We haven't taken notes on this, nor do we have a textbook. (We use Exeter, which is a bunch of random problems thrown together and bound.)

4. Originally Posted by pyrosilver
We haven't taken notes on this, nor do we have a textbook. (We use Exeter, which is a bunch of random problems thrown together and bound.)
Rotation matrix - Wikipedia, the free encyclopedia