A radial wave in three dimensions
Rotate and zoom the surface \(z=a\sin\left(\sqrt{x^2+y^2}\right)\). Then change \(a\) and see what it controls.
Drag the graph to orbit it, scroll to zoom, and adjust \(a\) in the expressions panel.
About this demo
This radial wave is not part of the tangent-line lesson. It is here to test Desmos’s 3D calculator and give us a starting point for future multivariable-calculus demonstrations.
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