If I give you a function f(x) (cartesian) and I ask you to rotate it about the x axis (counterclockwise) by an angle phi, what is the new function formula?(adsbygoogle = window.adsbygoogle || []).push({});

I remember I did this with matrices, but I can't remember the one for functions. For convenience, let angle phi be 0, pi/2, 3pi/2, and 2pi.

I am guessing 0 would remain the same. I just don't know how to use matrices on functions.

Does anyone understand my question?

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# I forgot what the formula for this is.

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