Integrating √[(1+x)/(1-x)] by Trigonometric Substitution

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You are awesome ....sir ... ocean of knowledge sir.. love u

NiteshYadav-eqer
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An easier way is to multiply top and bottom by 1+x. This gets rid of the square root on top, and then you just let x=sin a. The cos a will cancel out, and it's done in a few lines :-)

mathieupaturel