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Evaluate the indefinite integral.

$ \displaystyle \int \frac{\cos (\ln t)}{t} \, dt $

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$\sin (\ln t)+C$

00:46

Frank Lin

Calculus 1 / AB

Chapter 5

Integrals

Section 5

The Substitution Rule

Integration

Campbell University

Baylor University

Boston College

Lectures

05:53

In mathematics, an indefinite integral is an integral whose integrand is not known in terms of elementary functions. An indefinite integral is usually encountered when integrating functions that are not elementary functions themselves.

40:35

In mathematics, integration is one of the two main operations of calculus, with its inverse operation, differentiation, being the other. Given a function of a real variable (often called "the integrand"), an antiderivative is a function whose derivative is the given function. The area under a real-valued function of a real variable is the integral of the function, provided it is defined on a closed interval around a given point. It is a basic result of calculus that an antiderivative always exists, and is equal to the original function evaluated at the upper limit of integration.

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okay, we know we're looking at the integral Off co sign of Natural order 50 Divide by G. Did you we know we can substitute not royal of tea is you. Which means that de ti over tea as d'you which means now we're looking at the integral off co sign you, do you, which is a sign of you, plus C Now remember that you is equivalent to natural log of tea. Which means substituting in what? Us? We have a sign. Natural log of tea, plus C.

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