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Evaluate int sin^(-1)x dx....

Evaluate `int sin^(-1)x dx`.

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`int sin^(-1)x dx `
` =sin^(-1)x int1dx-int((sin^(-1)x)'int1dx)dx `
`=x sin^(-1)x-int(x)/(sqrt(1-x^(2)))dx`
`=xsin^(-1)x+(1)/(2)int(1-x^(2))^(-(1)/(2))(-2x)dx`
`=x sin^(-1)x+(1)/(2)((1-x^(2))^((1)/(2)))/((1)/(2))+C`
`=x sin^(-1)x +sqrt(1-x^(2))+C`
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