pt176900
Oct25-04, 07:24 PM
I am attempting to solve a physics problem, and in the process am getting tripped up by an integral:
integrate from 0 to pi (sin(theta)cos(theta) d_theta)
sorry, I don't know how to use the symbols =/
at any rate, I substitute U for sin theta, du is cos theta, and integrate and of course I get sin^2(theta)/2 which of course equals 1 - cos 2(theta), evaluated from zero to pi, which gives me an answer of zero.
In the context (potential on the surface of a sphere), this doesn't make any sense - so obviously my math must be wrong somewhere. if someone can point it out, then i'd be much obliged.
Thanks
integrate from 0 to pi (sin(theta)cos(theta) d_theta)
sorry, I don't know how to use the symbols =/
at any rate, I substitute U for sin theta, du is cos theta, and integrate and of course I get sin^2(theta)/2 which of course equals 1 - cos 2(theta), evaluated from zero to pi, which gives me an answer of zero.
In the context (potential on the surface of a sphere), this doesn't make any sense - so obviously my math must be wrong somewhere. if someone can point it out, then i'd be much obliged.
Thanks