I. Evaluate '9 + 3z°dS for the surface S defined by S r(u, v) = [6 cos(u) sin(v), 6 sin(u) sin(v), 3 cos(v)] for 0

Advanced Engineering Mathematics
10th Edition
ISBN:9780470458365
Author:Erwin Kreyszig
Publisher:Erwin Kreyszig
Chapter2: Second-order Linear Odes
Section: Chapter Questions
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Calc 4

### Surface Integral Calculation

To evaluate the surface integral 

\[ \iint_S \sqrt{9 + 3z^2} \, dS \]

for the surface \( S \) defined by the parametric equations:

\[ \mathbf{r}(u, v) = \left[ 6 \cos(u) \sin(v), 6 \sin(u) \sin(v), 3 \cos(v) \right] \]

we must consider the given bounds for the parameters \( u \) and \( v \):

\[ 0 \leq u \leq \frac{\pi}{2}, \quad 0 \leq v \leq \frac{\pi}{2}. \]

### Explanation of Parameters and Surface

- \( \mathbf{r}(u, v) \) specifies the parameterization of the surface \( S \).
- \( u \) and \( v \) are the parameters that vary within the given intervals.
- \( 6 \cos(u) \sin(v) \) and \( 6 \sin(u) \sin(v) \) represent the x and y coordinates respectively.
- \( 3 \cos(v) \) represents the z coordinate. 

The aim is to integrate the given function \( \sqrt{9 + 3z^2} \) over the surface area defined by the parametric equations.

### Important Considerations

For this problem, understanding the parametric representation of the surface and being able to compute the surface element \( dS \) will be crucial for carrying out the surface integral. The function under the integral involves the z-component of the parametric equations, which needs to be accounted for during the integration process.
Transcribed Image Text:### Surface Integral Calculation To evaluate the surface integral \[ \iint_S \sqrt{9 + 3z^2} \, dS \] for the surface \( S \) defined by the parametric equations: \[ \mathbf{r}(u, v) = \left[ 6 \cos(u) \sin(v), 6 \sin(u) \sin(v), 3 \cos(v) \right] \] we must consider the given bounds for the parameters \( u \) and \( v \): \[ 0 \leq u \leq \frac{\pi}{2}, \quad 0 \leq v \leq \frac{\pi}{2}. \] ### Explanation of Parameters and Surface - \( \mathbf{r}(u, v) \) specifies the parameterization of the surface \( S \). - \( u \) and \( v \) are the parameters that vary within the given intervals. - \( 6 \cos(u) \sin(v) \) and \( 6 \sin(u) \sin(v) \) represent the x and y coordinates respectively. - \( 3 \cos(v) \) represents the z coordinate. The aim is to integrate the given function \( \sqrt{9 + 3z^2} \) over the surface area defined by the parametric equations. ### Important Considerations For this problem, understanding the parametric representation of the surface and being able to compute the surface element \( dS \) will be crucial for carrying out the surface integral. The function under the integral involves the z-component of the parametric equations, which needs to be accounted for during the integration process.
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