Python | math.cos() function
In Python, math module contains a number of mathematical operations, which can be performed with ease using the module. math.cos()
function returns the cosine of value passed as argument. The value passed in this function should 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:
import math
a = math.pi / 6
print ( "The value of cosine of pi / 6 is : " , end = "")
print (math.cos(a))
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Output:
The value of cosine of pi/6 is : 0.8660254037844387
Code #2:
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 ( "\nout_array : " , out_array)
plt.plot(in_array, out_array, color = 'red' , marker = "o" )
plt.title( "math.cos()" )
plt.xlabel( "X" )
plt.ylabel( "Y" )
plt.show()
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Output:
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, 0.7891405093963934, 1.0]
Last Updated :
20 Mar, 2019
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