Python – math.atan() function
Last Updated :
28 May, 2020
Math module contains a number of functions which is used for mathematical operations. The math.atan() function returns the arctangent of a number as a value. The value passed in this function should be between -PI/2 and PI/2 radians.
Syntax: math.atan(x)
Parameter:This method accepts only single parameters.
- x :This parameter is the value to be passed to atan()
Returns:This function returns the arctangent of a number as a value.
Below examples illustrate the use of above function:
Example 1:
import math
a = math.pi / 6
print ( "The value of tangent of pi / 6 is : " , end = "")
print (math.atan(a))
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Output:
The value of tangent of pi / 6 is : 0.48234790710102493
Example 2:
import math
import numpy as np
import matplotlib.pyplot as plt
in_array = np.linspace( 0 , np.pi, 10 )
out_array = []
for i in range ( len (in_array)):
out_array.append(math.atan(in_array[i]))
i + = 1
print ( "Input_Array : \n" , in_array)
print ( "\nOutput_Array : \n" , out_array)
plt.plot(in_array, out_array, "go:" )
plt.title( "math.atan()" )
plt.xlabel( "X" )
plt.ylabel( "Y" )
plt.show()
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Output:
Input_Array :
[0. 0.34906585 0.6981317 1.04719755 1.3962634 1.74532925
2.0943951 2.44346095 2.7925268 3.14159265]
Output_Array :
[0.0, 0.3358423725664079, 0.6094709714274295, 0.808448792630022, 0.9492822422213403, 1.0504981725497873, 1.1253388328842984, 1.1823365638628716, 1.2269249964859286, 1.2626272556789118]
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