please help...

integrate 1/Sqrt[ x^2-1]

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- March 22nd 2006, 04:50 AMguessHow Do I integrate 1/Sqrt[ x^2-1]
please help...

integrate 1/Sqrt[ x^2-1] - March 22nd 2006, 05:07 AMCaptainBlackQuote:

Originally Posted by**guess**

RonL - March 22nd 2006, 05:21 AMguess
if there other method??

- March 22nd 2006, 05:29 AMCaptainBlackQuote:

Originally Posted by**guess**

problem trivial.

All you need to know is that:

and that:

RonL - March 22nd 2006, 05:35 AMguess
it's because i haven got to learn about cosh...

- March 22nd 2006, 07:28 AMCaptainBlackQuote:

Originally Posted by**guess**

substitution:

:cool:

RonL - March 22nd 2006, 07:37 AMTD!
If you don't want to use hyperbolic functions because you don't know them, an alternative is using the identity to substitute .

It won't be as easy as with the hyperbolic functions, but I assume you do know these basic trigonometric functions. - March 24th 2006, 06:24 AMguess
Thanks Bro,

I solved it using the trigo function substitution