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Student Support Forum: 'Revolution Plot with 2 variable' topicStudent Support Forum > General > "Revolution Plot with 2 variable"

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Renaud
12/12/12 8:28pm

I'm having trouble with RevolutionPlot3D with two variables.

I have this parabola

ContourPlot[0 == y^2 + x + y + 5, {x, -15, 5}, {y, -10, 10}, AxesLabel -> {x, y, z}]
but when I try to do RevolutionPlot3D with the equation

RevolutionPlot3D[{(y^2 + y + x + 5)}, {y, -5, 5}, {x, -5, 5}, RevolutionAxis -> {1, 0, 0}, PlotRange -> All, AxesLabel -> {x, y, z}]
it won't work, because x should be a Theta. How can I have something similar to

RevolutionPlot3D[{(y^2 + y + 5)}, {y, -5, 5}, {\[Theta], 0, 2 \[Pi]}, RevolutionAxis -> {1, 0, 0}, PlotRange -> All, AxesLabel -> {x, y, z}]

with a second variable?

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