Integration problem with e (check my work)

Click For Summary
SUMMARY

The integration problem presented involves the integral of 5e^(5x) * sin(e^(5x)) dx. The user correctly factored out the constant 5 and utilized the substitution method, letting u = e^(5x) and du = 5e^(5x) dx. This led to the simplified integral of u * sin(u), which the user integrated to obtain -u * cos(u) + C. The user confirmed the correctness of their solution shortly after posting.

PREREQUISITES
  • Understanding of integration techniques, specifically substitution.
  • Familiarity with exponential functions and their derivatives.
  • Knowledge of trigonometric functions and their integrals.
  • Basic calculus concepts, including the Fundamental Theorem of Calculus.
NEXT STEPS
  • Study advanced integration techniques, including integration by parts.
  • Learn about the application of substitution in integrals involving exponential and trigonometric functions.
  • Explore the properties of definite and indefinite integrals.
  • Practice solving integrals involving products of exponential and trigonometric functions.
USEFUL FOR

Students studying calculus, particularly those focusing on integration techniques, as well as educators looking for examples of substitution in integrals.

Aerosion
Messages
52
Reaction score
0

Homework Statement



(integrate)5e^(5x)*sin(e^(5x))dx

Homework Equations





The Attempt at a Solution



I factored 5 out of the integration and made u to be e^5x, and du to be 5e^5x, or (1/5)du=e^(5x)dx. Because of this, the 5 factored out of the equation canceled out with the (1/5), leaving (integrate)u*sin(u).

I integrated that, making sin(u)-u*cos(u) (I think) and pu the e^(5x)s back where the u's were. Am I right in doing this?
 
Physics news on Phys.org
[tex]\int{f'(x)\sin{f(x)} dx = -cos(f(x)) + C[/tex]
 
Last edited:
Never mind. I figured it out like right after I posted. Sorry.
 

Similar threads

  • · Replies 10 ·
Replies
10
Views
2K
  • · Replies 6 ·
Replies
6
Views
2K
  • · Replies 15 ·
Replies
15
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 5 ·
Replies
5
Views
3K
Replies
11
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 22 ·
Replies
22
Views
3K
Replies
5
Views
2K
  • · Replies 12 ·
Replies
12
Views
2K