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  2. Python | math.cos () function

Python | math.cos () function



In Python, a math module contains a number of math operations that can be easily accomplished using the module. math.cos() returns the cosine of the value passed as an argument. The value passed to this function must be in radians.

Syntax: math.cos (x)

Parameter:
x: value to be passed to cos ()

Returns: Returns the cosine of value passed as argument

Code # 1:

# Python code to demonstrate how cos () works

 
# import & quot; math & quot; for math operations

import math 

 

a = math.pi / 6

 
# returns the cosine of pi / 6

print ( "The value of cosine of pi / 6 is:" , end = "") 

print (math.cos (a)) 

Output: 

 The value of cosine of pi / 6 is: 0.8660254037844387

Code # 2:

# Show Python program
# Graphical view
# cos () function

import math

import numpy as np

import matplotlib.pyplot as plt 

 

in_array = np.linspace ( - ( 2 * np .pi), 2 * np.pi, 20 )

 

out_array = []

 

for i in range ( len (in_array)):

out_array.append (math.cos (in_array [i]))

i + = 1

 

  

print ( "in_array:" , in_array) 

print ( "out_array:" , out_arra y) 

 
# red for numpy.sin ()

plt.plot (in_array, out_array, color = ` red` , marker = "o" ) 

plt.title ( "math.cos ()" ) 

plt.xlabel ( "X" ) 

plt.ylabel ( "Y " ) 

plt.show () 

Exit:

in_array: [-6.28318531 -5.62179738 -4.96040945 -4.29902153 – 3.6376336 -2.97624567
-2.31485774 -1.65346982 -0.99208189 -0.33069396 0.33069396 0.99208189
1.65346982 2 .31485774 2.97624567 3.6376336 4.29902153 4.96040945
5.62179738 6.28318531]

out_array: [1.0, 0.7891405093963934, 0.2454854871407988, -0.40169542465296987, -0.8794737512064891, -0.9863613034027223, -0.6772815716257412, -0.08257934547233249, 0.5469481581224268, 0.9458172417006346, 0.9458172417006346, 0.5469481581224268, -0.0825793454723316, -0.6772815716257405, -0.9863613034027223, -0.8794737512064893, -0.40169542465296987, 0.2454854871407988, 0.789140509ques> ssobcode.topages = .jpg "/>