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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 trigonometric functions raised to powers. To simplify, use trigonometric identities or substitution methods. For example, you can use the identity \( \sin^2(x) = 1 - \cos^2(x) \) to rewrite \( \sin^2(x) \) in terms of \( \cos(x) \).
Step 2: Consider using substitution. Let \( u = \sin(x) \), which implies \( du = \cos(x) dx \). This substitution transforms the integral into a polynomial in terms of \( u \).
Step 3: Rewrite the integral in terms of \( u \). Substituting \( u = \sin(x) \) and \( du = \cos(x) dx \), the integral becomes \( \int 2u^2(1 - u^2) du \). Expand \( (1 - u^2) \) to simplify the expression.
Step 4: Integrate the resulting polynomial. After expanding, the integral becomes \( \int 2u^2 - 2u^4 du \). Use the power rule for integration: \( \int u^n du = \frac{u^{n+1}}{n+1} + C \).
Step 5: Substitute back \( u = \sin(x) \) into the result to express the solution in terms of \( \sin(x) \). Add the constant of integration \( c \) to complete the solution.