Calculating Sphere Volume Using Trig Substitution

kristian321
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Homework Statement



find the volume of a sphere of radius R by integrating over the primary volume elements in cartesian coordinates. Hint: use a trig substitution for your integral over dy

Homework Equations





The Attempt at a Solution



I don't understand what the problem wants me to do. I know equation of a sphere is R=sqrt(x^2+y^2+z^2) and maybe integrating will give me the volume. And if what would my limits be? Are they 0 to R for all?
 
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kristian321 said:

Homework Statement



find the volume of a sphere of radius R by integrating over the primary volume elements in cartesian coordinates. Hint: use a trig substitution for your integral over dy

Homework Equations





The Attempt at a Solution



I know the limits for the integration. But I can't figure out what equation I'm supposed to integrate over
 
There are two things I don't understand about this problem. First, when finding the nth root of a number, there should in theory be n solutions. However, the formula produces n+1 roots. Here is how. The first root is simply ##\left(r\right)^{\left(\frac{1}{n}\right)}##. Then you multiply this first root by n additional expressions given by the formula, as you go through k=0,1,...n-1. So you end up with n+1 roots, which cannot be correct. Let me illustrate what I mean. For this...
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