Techniques of Integration - Integration of \({\frac{1}{\sqrt{a^2 - x^2}}, \frac{1}{a^2 + x^2}, \frac{1}{a^2 - x^2}, \frac{1}{x^2 - a^2}}\)
\(\displaystyle\int{\frac{1}{\sqrt{2+8x-{{x}^{2}}}}}\mathrm{ d}x\)
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Answer:\(\sin^{-1}\left(\frac{x-4}{3\sqrt2}\right)+C\)