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Evaluate the integral.

$ \displaystyle \int^{\pi}_0 f(x) \,dx $ where $ f(x) = \left\{ \begin{array}{ll} \sin x & \mbox{if $ 0 \le x < \pi/2 $}\\ \cos x & \mbox{if $ \pi/2 \le x \le \pi $} \end{array} \right.$

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Frank Lin

Calculus 1 / AB

Chapter 5

Integrals

Section 3

The Fundamental Theorem of Calculus

Integration

Missouri State University

Baylor University

University of Michigan - Ann Arbor

Idaho State University

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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03:59

Evaluate the integral.…

01:40

04:14

04:12

Evaluate the integrals.

02:45

01:36

The first thing we know is that we can split the integral. We know there's a property of inter girls that allows us to split them up into two, which makes it easier to them plug in and souls, which means we cannot plug in to get we end up with simply zero.

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