- 5

- 0

I need help with this

when I introduce this commands I didn't get the right answer, and I don't know why, somebody can help me.

For example

clear all

r = 'sin(5*t)';

syms t w;

f = eval(r)

fourier(f)

F = fourier(f);

ifourier(F,'t')

and the result is:

f =

sin(5*t)

%fourier transform which is wrong

ans =

-pi*i*(dirac(w - 5) - dirac(w + 5))

%and the inverse fourier transform which is wrong too

ans =

i/(2*exp(5*i*t)) - (i*exp(5*i*t))/2

where is the problem???, Why is wrong???