# sympy.integrals.transforms.inverse_cosine_transform() in Python

• Last Updated : 10 Jul, 2020

With the help of inverse_cosine_transform() method, we can compute the inverse cosine transformation and return the unevaluated function by using this method.

inverse cosine function

Syntax : inverse_cosine_transform(F, k, x, **hints)

Return : Return the unevaluated function.

Example #1 :

In this example we can see that by using inverse_cosine_transform() method, we are able to get the inverse cosine transformation and return the unevaluated function.

## Python3

 `# import inverse_cosine_transform``from` `sympy ``import` `inverse_cosine_transform, exp, sqrt, pi``from` `sympy.abc ``import` `x, k, a`` ` `# Using inverse_cosine_transform() method``gfg ``=` `inverse_cosine_transform(sqrt(``2``)``*``a``/``(sqrt(pi)``*``(a``*``*``2` `+` `k``*``*``2``)), k, x)`` ` `print``(gfg)`

Output :

exp(-a*x)

Example #2 :

## Python3

 `# import inverse_cosine_transform``from` `sympy ``import` `inverse_cosine_transform, exp, sqrt, pi``from` `sympy.abc ``import` `x, k, a`` ` `# Using inverse_cosine_transform() method``gfg ``=` `inverse_cosine_transform(sqrt(``2``)``*``a``/``(sqrt(pi)``*``(a``*``*``2` `+` `k``*``*``2``)), k, ``2``)`` ` `print``(gfg)`

Output :

exp(-2*a)

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