- #1
jonroberts74
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Homework Statement
Find volume of the ellipsoid ##x^2 +2(y^2+z^2) \le 10## intersected by the cylinder ##y^2 + z^2 \le 1 ##
The Attempt at a Solution
seems like changing to cylindrical coordinates would be bestso I have
[tex]\left\{ \begin{array}{cc} r^2cos\theta + 2r^2sin^2\theta +2z^2 \le 10 \\r^2sin^2\theta +z^2 \le 1 \end{array}\right.[/tex]
[tex]0 \le \theta \le 2\pi[/tex]
and solving for z [tex]-\sqrt{1-r^2sin^2\theta} \le z \le \sqrt{1-r^2sin^2\theta}[/tex]
and [tex]-\sqrt{8}sec\theta \le r \le \sqrt{8}sec\theta[/tex]
[tex]\int_{0}^{2\pi}\Bigg(\int_{-\sqrt{1-r^2sin^2\theta}}^{\sqrt{1-r^2sin^2\theta}}\Bigg(\int_{-\sqrt{8}sec\theta}^{\sqrt{8}sec\theta}rdr\Bigg)dz\Bigg)d\theta[/tex]
I tried it on Wolfram|Alpha to check but it didn't seem to work.
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