Question: How to linear transform 2D Cartesian coordiantes in maple?


I have a function f(x) = x/2 on Cartesian coordinates. I want to rotate the y-axis clockwise and x-axis anticlockwise by the

same (arbitrary, acute) angle (something like the 2nd figure of,

yet I also want to retain the Cartesian grid and the function f(x) at the background. 

Could someone tell me how to do so? Thanks!

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