How is the following integrated?

$\displaystyle \int \sqrt{1-4x^2} \,dx$

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- Sep 1st 2010, 02:00 PMMike9182Help with trig substition
How is the following integrated?

$\displaystyle \int \sqrt{1-4x^2} \,dx$ - Sep 1st 2010, 02:21 PMpickslides
try $\displaystyle x = \frac{1}{2}\sin t$

- Sep 1st 2010, 02:28 PMMike9182
I tried that, but I can't find any errors in my work, and I got a different answer than my book did.

- Sep 1st 2010, 02:35 PMpickslides
Show me your workings.

- Sep 1st 2010, 02:53 PMMike9182
I found my error going back over it to type it in. Thanks