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Calculus1 9 Online
OpenStudy (unklerhaukus):

\[\int\frac{\mathrm dx}{x^2√{1+x^2})}\]

OpenStudy (anonymous):

put x=tan@

OpenStudy (unklerhaukus):

how do you know straight away that that is the method to use?

OpenStudy (anonymous):

|dw:1377090635110:dw|

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