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Integrate each of the given functions.$$\int \frac{\sin (1 / x)}{2 x^{2}} d x$$
$\frac{1}{2} \cos \left(\frac{1}{x}\right)+C$
Calculus 1 / AB
Chapter 28
Methods of Integration
Section 4
Basic Trigonometric Forms
Integrals
Missouri State University
Oregon State University
Boston College
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All right. We want to integrate the following integral. That is the indefinite integral of sine of one over X. D X divided by two X square. This question is testing our knowledge of methods of integration. We've previously learned about the power rule for integration, the log rule and the exponential role in this problem. We're being challenged to use trigger metric integral. So there are 10 million metric integral. To identify which one we need to use. We need to identify which triggered metric function. President are integral matches with one of those one through 10. So we see that are integral has signed. Therefore we're gonna use integral one which has solution negative coast you plus C. Therefore to use one effectively we have to identify you do you so you as one over X. The argument sign. Do you then is negative one over X squared dx. So are integral has an extra factor of negative two that we carry over to our final solution. So carrying over the negative to and including negative coast plus the other solution, we have our integral equal to four. Co sign one over X plus C.
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