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\textbf{Math 126C: Calculus II}
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\textbf{Quiz 4}\quad \textsl{September 19, 2000}

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\emph{Show all your work and all important steps.}
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1. Simplify $\cos(\tan^{-1}\sqrt{x^2+2x})$.

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2. Evaluate $\int \frac{1}{\sqrt{2x - x^2}}\, dx$.

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3. Evaluate $\int \frac{1}{\sqrt{x^2 + 2x}}\, dx$.

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