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:
# Python code to demonstrate the working of cos()     # importing "math" for mathematical operations import math     a = math.pi / 6     # returning the value of cosine of pi / 6 print ("The value of cosine of pi / 6 is : ", end ="") print (math.cos(a)) |
The value of cosine of pi/6 is : 0.8660254037844387
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Code #2:
# Python program showing # Graphical representation of # cos() function import mathimport numpy as npimport 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)   # 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() |
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]
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