Antiderivative of square root

Antiderivative of square root of x. Antiderivative of square root of 9-x^2. Antiderivative of square root of 25-x^2. Antiderivative of square root of 1-x^2. I'm assuming that you are referring to the problems I have "trig difficult" label. If you have something as integral DX (1 / SQRT (9-x ^ 2)), you are a little screwed. U-replacement won't work. ................
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