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Mathematics 20 Online
OpenStudy (anonymous):

Evaluate the definite integral please.

OpenStudy (anonymous):

\[\int\limits_{0}^{1} \frac{logx}{\sqrt{1-x^2}} dx\]

OpenStudy (anonymous):

Wow. That is a doozy. Try plugging it into WA, it gives back a crazy indefinite integral that I wouldn't know how to solve even with the limits given.

OpenStudy (anonymous):

:'(

OpenStudy (psymon):

That's some nasty substitution if it exists O.o

OpenStudy (anonymous):

The problem is correctly typed? Looking at the other questions you've asked, they're difficult but this one isn't likely to be solved with pen and paper.

OpenStudy (zzr0ck3r):

lol

OpenStudy (anonymous):

Wow. Not sure how. But wow.

OpenStudy (anonymous):

$$\int_{0}^1\frac{\ln(x)}{\sqrt{1-x^2}} dx =-\frac{\pi}{2}\ln(2)$$

OpenStudy (zzr0ck3r):

we can all type the integral into a calculator, how did you get the answer is the goal...

OpenStudy (anonymous):

It can be evaluated in terms of several trigonometric functions, some logarithms, and a dilogarithm, you need to know the value of a special function, though I am sure there are other ways.

OpenStudy (anonymous):

If he comes back with all the steps I'm going to order a truck full of humble pies.

OpenStudy (anonymous):

I am to lazy to do the work, why don't you post this on mse and wait

OpenStudy (zzr0ck3r):

lol @amishjeb

OpenStudy (loser66):

I think it is improper integral since the upper limit is 1 and it makes the integral undefined. therefore we have to use limit of improper integral there \[lim_{t\rightarrow 1}\int_0^t {\frac{logx}{\sqrt{1-x^2}}}dx\]

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