Python | math.sin() function

Last Updated : 20 Mar, 2019

In Python, math module contains a number of mathematical operations, which can be performed with ease using the module. math.sin() function returns the sine of value passed as argument. The value passed in this function should be in radians.

Syntax: math.sin(x) Parameter: x : value to be passed to sin() Returns: Returns the sine of value passed as argument

Code #1:

Python3 1==

# Python code to demonstrate the working of sin()
   
# importing "math" for mathematical operations 
import math 
  
a = math.pi / 6
   
# returning the value of sine of pi / 6 
print ("The value of sine of pi / 6 is : ", end ="") 
print (math.sin(a))

Output:

The value of sine of pi/6 is : 0.49999999999999994

Code #2:

Python3 1==

# Python program showing 
# Graphical representation of 
# sin() function 
import math
import matplotlib.pyplot as plt 

in_array = [-3.14159265, -2.57039399, -0.28559933,
            0.28559933, 2.57039399,  3.14159265]

out_array = []

for i in range(len(in_array)):
    out_array.append(math.sin(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.sin()") 
plt.xlabel("X") 
plt.ylabel("Y") 
plt.show()

Output:

in_array : [-3.14159265, -2.57039399, -0.28559933, 0.28559933, 2.57039399, 3.14159265] out_array : [-3.5897930298416118e-09, -0.5406408168673427, -0.2817325547837714, 0.2817325547837714, 0.5406408168673427, 3.5897930298416118e-09]