help with Laplace transform of tangent function

korean

New member
Joined
Jun 30, 2005
Messages
21
hey does anyone know what the Laplace transformation of tangent is??
im having trouble finding it. i dont need the whole proof of it i just simply need to know what it is to finish my original problem.

ps i didnt know if i should post here or the adv. math forums because this question can be put in both....depending on the way you look at it....so ill just put it in both cuz someone looking in here and not there might know the answer.
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
11,317
Isn't there a continuity problem?

p.s. Bad idea. Generally, visitors are the same.
 

stapel

Super Moderator
Staff member
Joined
Feb 4, 2004
Messages
15,948
Note: Other copy of this question deleted.
 

korean

New member
Joined
Jun 30, 2005
Messages
21
umm ok so your saying that the laplace transformation of tangent does not exist?? because the tangent function is discontinous??
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
11,317
No, not quite.

We have a definition for continuous f(t) defined for t>0, provided the limit exists.

We have a definition for f(t) piecewise continuous for t>0, with a finite number of discontinuities, provided the limit of the last piece exists.

I'm not seeing a definition for an infinite number of discontinuities.
 

korean

New member
Joined
Jun 30, 2005
Messages
21
ok you lost me here??? can you give me an example??? or something??
 

tkhunny

Moderator
Staff member
Joined
Apr 12, 2005
Messages
11,317
I'm just looking at the definition of the Laplace Transform. Have you a book?
 

daon

Senior Member
Joined
Jan 27, 2006
Messages
1,284
L(tan(t)) = \(\displaystyle \L \int^{oo}_0 e^{-st}tan(t)dt\)

Have fun :p
 
Top