Integrate by parts
\[\int\limits_{}^{} \arccos(x)dx = (\arccos(x)x^{2}/2) - \int\limits_{}^{} x^{2}/\sqrt{1-x^{2}} dx\]
I don't know what do do now :l

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crud dx should be in the neumorator fyi for the last integral

oh yeah it should be positive but I still dont see what I can do next :l

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