FOURIER SERIES 程序包 符号

# NInverseFourierCosTransform

gives a numerical approximation to the inverse Fourier cosine transform of expr evaluated at the numerical value t, where expr is a function of .

## 更多信息更多信息

• To use , you first need to load the Fourier Series Package using Needs["FourierSeries`"].
• The numerical approximation to the inverse Fourier cosine transform of expr is by default defined to be NIntegrate[expr Cos[ t], {, 0, ∞}].
• Different choices for the definition of the inverse Fourier cosine transform can be specified using the option FourierParameters.
• With the setting FourierParameters->{a, b}, the inverse Fourier cosine transform computed by is 2NIntegrate[expr Cos[b t], {, 0, ∞}].
• The parameter b in the setting FourierParameters->{a, b} must be numeric.
• In addition to the option FourierParameters, can also accept the options available to NIntegrate. These options are passed directly to NIntegrate.

## 范例范例打开所有单元关闭所有单元

### 基本范例 (1)基本范例 (1)

Numerical approximation for an inverse Fourier cosine transform:

 Out[2]=

Compare with the answer from symbolic evaluation:

 Out[3]=
 Out[4]=

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