i need help with the question:

Evaluate the following integral using a trigonometric substitution.

int[dx/(x^2-1)^(3/2)], x>1

any help would be appreciated, thanks.

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- Aug 5th 2009, 10:55 PMJonny-123Trigonometric substitution for integrals
i need help with the question:

Evaluate the following integral using a trigonometric substitution.

int[dx/(x^2-1)^(3/2)], x>1

any help would be appreciated, thanks. - Aug 5th 2009, 11:01 PMo_O
Trigonometric Substitution

Does your integrand contain any of the forms given in the wiki entry? Yes. $\displaystyle x^2 - a^2$.

What trig substitution should you use? $\displaystyle x = \cdots$ - Aug 6th 2009, 12:48 AMJonny-123
oh ok so the substution is x=secx

i got the answer: cosx.ln|sinx|+c

is this the correct answer?