Basic Examples 
(2)
 

Numerical approximation for an inverse Fourier cosine transform:
In[50]:=
[◼]
NInverseFourierCosTransform
[E^(-6ω),ω,1.4]
Out[50]=
0.126115
Compare with the answer from symbolic evaluation:
In[51]:=
InverseFourierCosTransform[E^(-6ω),ω,t]
Out[51]=
6
2
π
36+
2
t
In[52]:=
%/.{t1.4}
Out[52]=
0.126115