- #1
chemphys1
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Homework Statement
sorry if question is unclear can't draw the integal sign out
Show that
Integral infinity-0 dz/((e^2z) - 1)^1/2 = integral 1- 0 dx/(1-x^2)^1/2 = pi/2
The Attempt at a Solution
I can get from the second integral to pi/2, as the second integral is sin^1(1) = pi/2
However, I do not understand how to go between these two integrals
infinity-0 dz/((e^2z) - 1)^1/2 = 1- 0 dx/(1-x^2)^1/2
I tried substituing things like x = z, but doesn't work. Can't see how you would change the limits from infinity to 0, to 1 to 0?
Maths is not my strong point so this could well be quite simple
any help much appreciated