Exponents and Imaginary Numbers

Click For Summary
SUMMARY

The forum discussion centers on simplifying an expression derived from the integral of a Fourier Transform, specifically A(je^(-jw(T0+t/2)) - je^(T0-t/2)w)/(1/w). Key concepts include the use of the imaginary unit j, the relationship between exponential functions and trigonometric identities, and the application of the sine function expressed as sin(x) = (e^{-ix} - e^{ix})/(2i). Participants emphasize the importance of clarity in mathematical notation and confirm that simplification can proceed without an imaginary number in the denominator.

PREREQUISITES
  • Understanding of Fourier Transforms
  • Familiarity with complex numbers and the imaginary unit j
  • Knowledge of trigonometric identities, particularly Euler's formula
  • Proficiency in mathematical notation and LaTeX formatting
NEXT STEPS
  • Research the properties of Fourier Transforms in signal processing
  • Learn about the simplification of complex exponentials
  • Study the application of Euler's formula in trigonometric identities
  • Explore advanced techniques for manipulating integrals involving complex numbers
USEFUL FOR

Students and professionals in mathematics, engineering, and physics who are working with Fourier Transforms, complex analysis, or signal processing will benefit from this discussion.

Natalie89
Messages
28
Reaction score
0
Hello,

I did the integral of a Fourier Transform which resulted in this:

A(je^(-jwe^(To+t/2) - je^-jw(T0-t/2))/(1/w)

Where A is the amplitude, j the imaginary number, and w is omega or 2*pi*f.

My question is, how can this be further simplifier. I am forgetting how to simplify these exponents, and what trigonometric identities would further simplify the solution.

Thank you!
 
Physics news on Phys.org
Please, check your brackets out. I doubt you got an exponential function to the power of another exponential function after you integrated.
 
Oh I am sorry, I made a typo.

A(je^(-jw(T0+t/2)-je^(T0-t/2)w))(1/w)
 
Does the second exponent have a j in it? Please consider using latex your post is a messy and difficult to read.
 
Here's an attachment in word! Sorry for the confusion.
 

Attachments

Natalie89 said:
Here's an attachment in word! Sorry for the confusion.

Use the following

sin(x) = \frac{(e^{-ix} - e^{ix})}{2i}

What you have right now is the same as

\frac{Aj e^{jwT}}{w} \left( e^{-jw\frac{t}{2}} -e^{jw \frac{t}{2}} \right)
 
I am still able to do this without the imaginary number in the denominator?
 
Natalie89 said:
I am still able to do this without the imaginary number in the denominator?
Well, <br /> 2j*sin(x) = \left(e^{-jx} - e^{jx} \right)<br />
Yes, you can use it without the imaginary number in the demonimator.
 

Similar threads

  • · Replies 2 ·
Replies
2
Views
6K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 7 ·
Replies
7
Views
5K
Replies
1
Views
2K
  • · Replies 3 ·
Replies
3
Views
1K
  • · Replies 17 ·
Replies
17
Views
2K
Replies
1
Views
2K
Replies
1
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K