- #1
ryoma
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Homework Statement
How do you solve the surface area of a sphere using Riemann Sums?
Homework Equations
The Attempt at a Solution
I started out with
2 * (lim n->∞ [ (i=1 to n) ∑ [ 2*pi*(√(r^2 - (i/rn)^2))*(r/n) ] ])
where the summation is the surface area of the cylinders (or discs) inside a hemisphere, and simplified to
2 * (lim n->∞ [ (2*pi/n^2) * (i=1 to n)) ∑ [ √((nr^2)^2 - i^2) ] ])
I'm pretty sure I'm doing this right, but I don't know what to do now. Is it possible to use something like a trig substitution like in integrals except with summations? Thank you for any help. Oh, and this isn't for class or anything.
EDIT:
n is the number of cylinders
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