Qualification > Math

Maths/Physics help

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omarsubei:
Do you mind if we do this on msn, I think it'd be much easier

astarmathsandphysics:
V=
     
Use the substition x=2sint then dx=2costdt
     

The limits are changed from

We have V=

omarsubei:
WHAT???!! 6pi?? I just got it anyways, my bounds were wrong, they need to be from -1 to 1, and I was doing -2 to 2. Thanks anyways. Appreciate it.

astarmathsandphysics:
I dont understand. If the limits are +-1 how can the whole circle be shaded?

I looked up the volume of a tours here. It is consistent with my answer.
http://whistleralley.com/torus/torus.htm

omarsubei:
I guess you have to split it into the two equations + and -, that way you can have the whole circle shaded

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