Definite Integral of Absolute Value Function (Calc I)

Click For Summary

Homework Help Overview

The problem involves evaluating the definite integral of the absolute value of a function, specifically $$\int_{0}^{\ 2\pi} \ |e^{sin(x)}cos(x)| \, dx$$. The original poster expresses uncertainty about the approach to take, particularly regarding how to handle the absolute value within the integral.

Discussion Character

  • Exploratory, Assumption checking

Approaches and Questions Raised

  • The original poster questions whether to break the integral into segments based on the positivity and negativity of the function, similar to simpler absolute value problems. Some participants affirm this approach.

Discussion Status

The discussion includes affirmations of the proposed method for handling the integral. Participants are exploring the approach without reaching a definitive conclusion or consensus on alternative methods.

Contextual Notes

There is a mention of the integral simplifying to a specific numerical value, but the focus remains on the method of integration rather than the solution itself. The original poster expresses a desire for potentially less tedious methods, indicating a consideration of efficiency in problem-solving.

physicsdreams
Messages
57
Reaction score
0

Homework Statement



$$\int_{0}^{\ 2\pi} \ |e^{sin(x)}cos(x)| \, dx$$

I know that it simplifies to $$ 2e- \frac{2}{e} ≈ 4.7 $$ I'm not sure how to approach this problem. Do I just break the integral up into the domains where it's positive and negative and integrate each component separately as I would with a much simpler absolute value function?

Thanks in advance,

physicsdreams
 
Physics news on Phys.org
physicsdreams said:

Homework Statement



$$\int_{0}^{\ 2\pi} \ |e^{sin(x)}cos(x)| \, dx$$

I know that it simplifies to $$ 2e- \frac{2}{e} ≈ 4.7 $$ I'm not sure how to approach this problem. Do I just break the integral up into the domains where it's positive and negative and integrate each component separately as I would with a much simpler absolute value function?

Thanks in advance,

physicsdreams

Yes, that's exactly what you should do.
 
Dick said:
Yes, that's exactly what you should do.

Wow, you're quick! Thanks for the help, Dick. I was hoping there would be a less tedious method to go about solving problems such as these, but I guess that's math for ya'.

Thanks again!
 
physicsdreams said:
Wow, you're quick! Thanks for the help, Dick. I was hoping there would be a less tedious method to go about solving problems such as these, but I guess that's math for ya'.

Thanks again!

Well, it was a pretty easy answer. You're very welcome.
 

Similar threads

  • · Replies 8 ·
Replies
8
Views
3K
  • · Replies 6 ·
Replies
6
Views
2K
Replies
9
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 4 ·
Replies
4
Views
4K
  • · Replies 19 ·
Replies
19
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K
  • · Replies 7 ·
Replies
7
Views
2K
Replies
3
Views
2K
  • · Replies 9 ·
Replies
9
Views
2K