Volume of the space region inside sphere outside coni

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SUMMARY

The discussion focuses on calculating the volume of the space region inside a sphere defined by the equation \(x^2 + y^2 + z^2 = 1\) and outside a cone described by \(z^2 = x^2 + y^2\). The solution involves plotting the graph to visualize the intersection points of the cone and sphere in the plane \(y = 0\). The user is guided to find the intersection points and subsequently determine the limits for the angles \(\phi\) using spherical coordinates. The triple integral formula \(\int \int \int \rho^2 \sin \phi d\rho d\phi d\theta\) is recommended for calculating the volume.

PREREQUISITES
  • Understanding of spherical coordinates
  • Knowledge of triple integrals
  • Familiarity with conic sections and their equations
  • Ability to graph equations in three-dimensional space
NEXT STEPS
  • Study the method of finding intersections between geometric shapes
  • Learn about spherical coordinate transformations in calculus
  • Practice solving triple integrals with varying limits
  • Explore graphical representation of three-dimensional equations
USEFUL FOR

Students studying calculus, particularly those focusing on multivariable calculus and geometric applications, as well as educators looking for examples of volume calculations involving spheres and cones.

melihaltintas
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Homework Statement


Hi everybody i have a problem please help me (sorry for my bad english)

Homework Equations


volume of the space region inside sphere outside coni
z^2=x^2+y^2 coni
x^2+y^2+z^2 =1 sphere

The Attempt at a Solution


I am new in this forum , I search question like this and i found but i didn't solve this question with method that is performed other questions
 
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Hi melihaltintas

First, always plot the graph so you can understand how to find the limits.

I have attached the graph of the xz-trace coordinates (in the plane y = 0). The region of volume that you need to find is shaded in blue.

Start by finding the points of intersection of the sphere and cones (in the plane y = 0).

Your equations for the cones and sphere in the plane y = 0, become:
z^2=x^2<br /> \\x^2+z^2 =1
Solve these two equations to find the x and z. From there, you'll be able to find the two required angles for ##\phi## which define the limits.

Finally, use the triple integral formula in terms of spherical coordinates:
\int \int \int \rho^2 \sin \phi d\rho d\phi d\theta
 

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Last edited:
thanks a lot :)
 

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