I wasn't sure if this is a Computational Science SE question or a Stack Overflow question but I think it's more of this one.
I wanted to make a graph where I can rotate a hyperbola (not parabola or ellipse) about any point, not just the origin on a Cartesian Plane. This is the equation: $$\left(\frac{(y-k)\sin\theta-(x-h)\cos\theta}a\right)^2-\left(\frac{(y-k)\cos\theta-(x-h)\sin\theta}b\right)^2=1$$
But when I plot this equation in Desmos, it keeps saying Too many variables. I don't know what to do with this. It seems like the $\sin$ and $\cos$ are causing it to say that because when I take it out, it doesn't say that anymore.
Question: Why is it saying that? How is the $\sin$ and $\cos$ causing it to say there are too many variables. Is my equation wrong or is it the graphing calculator itself that is at fault?