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Python | sympy.cos() method

Last Updated : 30 Jan, 2023
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In sympy, cos() method is cosine function. Using the cos(x) method in the sympy 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. 

Python3
# importing sympy library
from sympy import *

# calling cos() method on expression
geek1 = cos(-1)
geek2 = cos(pi / 3)
geek3 = cos(pi)

print(geek1)
print(geek2)
print(geek3)

Output: 

cos(1)
1/2
-1

  Code #2: 

Python3
# 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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