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# Python | sympy.cos() method

• Last Updated : 19 Jul, 2019

In simpy, `cos()` method is cosine function. Using the `cos(x)` method in simpy module, we can compute the cosine of x.

```Syntax : sympy.cos(x)

Return : Returns the cosine of x ```

Code #1:
Below is the example using cos() method to find cosine function.

 `# importing sympy library``from` `sympy ``import` `*`` ` `# calling cos() method on expression``geek1 ``=` `cos(``-``1``)``geek2 ``=` `cos(pi ``/` `3``)`` ` `print``(geek1)``print``(geek2)`

Output:

```cos(1)
1/2
```

Code #2:

 `# importing sympy library``from` `sympy ``import` `*`` ` ` ` `# calling cos() method on expression``geek ``=` `cos(``2` `+` `5j``)``print``(geek)`

Output:

`-30.8822353189167 - 67.4727884405875*I`

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