How is the following integrated? $\displaystyle \int \sqrt{1-4x^2} \,dx$
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try $\displaystyle x = \frac{1}{2}\sin t$
I tried that, but I can't find any errors in my work, and I got a different answer than my book did.
Show me your workings.
I found my error going back over it to type it in. Thanks
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