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Multiple Choice
Evaluate the indefinite 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 a trigonometric function and consider using a substitution to simplify the expression. A common substitution for integrals involving sin(t) and cos(t) is the Weierstrass substitution: let u = tan(t/2), which transforms trigonometric functions into rational functions.
Step 2: Recall the relationships for the Weierstrass substitution: sin(t) = 2u / (1 + u^2) and cos(t) = (1 - u^2) / (1 + u^2). Also, dt = 2 du / (1 + u^2). Substitute these into the integral.
Step 3: Replace sin(t), cos(t), and dt in the integral with their expressions in terms of u. The integral becomes ∫ (2u / (1 + u^2)) / (1 + (1 - u^2) / (1 + u^2)) * (2 du / (1 + u^2)). Simplify the expression to make the integral easier to evaluate.
Step 4: Simplify the denominator and numerator to reduce the integral to a simpler form. After simplification, the integral should be expressed in terms of u, which can be integrated using standard techniques.
Step 5: Perform the integration in terms of u, then substitute back u = tan(t/2) to return the solution in terms of t. Add the constant of integration, c, to complete the indefinite integral.