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Multiple Choice
Evaluate the integral. (Use c for the constant of integration.)
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Verified step by step guidance
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Step 1: Recognize that the integral involves the inverse sine function, \( \sin^{-1}(x) \), and requires integration by parts. Recall the formula for integration by parts: \( \int u \, dv = uv - \int v \, du \).
Step 2: Choose \( u = \sin^{-1}(x) \) and \( dv = dx \). This choice simplifies the differentiation and integration steps. Compute \( du \) and \( v \): \( du = \frac{1}{\sqrt{1 - x^2}} \, dx \) and \( v = x \).
Step 3: Substitute \( u \), \( v \), \( du \), and \( dv \) into the integration by parts formula: \( \int \sin^{-1}(x) \, dx = x \sin^{-1}(x) - \int x \frac{1}{\sqrt{1 - x^2}} \, dx \).
Step 4: Simplify the remaining integral \( \int x \frac{1}{\sqrt{1 - x^2}} \, dx \). Recognize that \( \frac{d}{dx}(1 - x^2) = -2x \), so let \( u = 1 - x^2 \), which makes \( du = -2x \, dx \). Rewrite the integral in terms of \( u \): \( \int x \frac{1}{\sqrt{1 - x^2}} \, dx = -\frac{1}{2} \int u^{-1/2} \, du \).
Step 5: Solve \( \int u^{-1/2} \, du \) to get \( 2\sqrt{u} \), and substitute back \( u = 1 - x^2 \). Combine all terms to write the final expression: \( x \sin^{-1}(x) + \sqrt{1 - x^2} + C \), where \( C \) is the constant of integration.