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I know the title is misleading but what I am asking is how I can get this matrix

x_{1}cosθ-x_{2}sinθ

x_{1}sinθ+x_{2}cosθ

to the matrix multiplication form

cosθ -sinθ | x_{1}

sinθ cosθ | x_{2}

where

A=

cosθ -sinθ

sinθ cosθ

x=

x_{1}

x_{2}

Is there a good method to do this or do I have to find it by eye-balling it?

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# Homework Help: Linear Algebra - How to get matrix form Ax.

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