# General transformation matrix

I am currently working through some of my maths assignment, and i have this question, and i can't work out what it means, and i am sure there is something to missing which would make this question make more sense, here is the question:

What is the general transformation matrix for a rotation of angle $\theta$ about the origin?

That is all the questions says, any one able to help me out, who may understand it better then me?

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Dear @AlexTrott Is this a homework question? If so, please add the tag (homework). Please consider that for future questions as well. –  user2468 Mar 20 '12 at 18:40

The map which rotates any vector in the plane an angle $\theta$ around the origin is a linear map. Hence it can be given by multiplication by a matrix. What is this matrix?