Python Program for atan() Function

In the previous article, we have discussed Python Program for asin() Function
atan() Function in Python:

The arc tangent of a number (x) is returned as a numeric value between -PI/2 and PI/2 radians by the math.atan() method.

Arc tangent is also defined as an inverse tangent function of x, where x is the value to be calculated for the arc tangent.

Syntax:

math.atan(x)

Parameters:

x: This is Required. It is a number that is either positive or negative. If x is not a number, TypeError is returned.

Return Value:

It returns a float value ranging from -PI/2 to PI/2 representing a number’s arc tangent.

The Arc Tangent value is returned if the number argument is positive or negative.
The atan() function throws a TypeError if the number argument is not a number.

Examples:

Example1:

Input:

Given first number = 0.7
Given second number = 1

Output:

The result after applying atan() function on above given first number 0.7  =  0.6107259643892086
The result after applying atan() function on above given second number 1  =  0.7853981633974483

Example2:

Input:

Given first number = -1
Given second number = 0.3

Output:

The result after applying atan() function on above given first number -1  =  -0.7853981633974483
The result after applying atan() function on above given second number 0.3  =  0.2914567944778671

Method #1: Using Built-in Functions (Static Input)

Approach:

Import math module using the import keyword.
Give the list as static input and store it in a variable.
Give the first number as static input and store it in another variable.
Apply math.atan() function to the given first number to get the arc tangent value (inverse of tangent ) of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.atan() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as static input and store it in a variable.
gvn_lst = [0.6, -0.3, 1, 0.8]
# Give the first number as static input and store it in another variable.
gvn_numb1 = 0.7
# Apply math.atan() function to the given first number to get arc tangent value
# (inverse of tangent) of a given number.
# Store it in another variable.
fnl_rslt = math.atan(gvn_numb1)
print("The result after applying atan() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = 1
print("The result after applying atan() function on above given second number",
      gvn_numb2, " = ", math.atan(gvn_numb2))
# Apply math.atan() function to the given list element and print it.
print(
    "The result after applying atan() function on given list element gvnlst[1] = ", math.atan(gvn_lst[1]))

Output:

The result after applying atan() function on above given first number 0.7  =  0.6107259643892086
The result after applying atan() function on above given second number 1  =  0.7853981633974483
The result after applying atan() function on given list element gvnlst[1] =  -0.2914567944778671

Method #2: Using Built-in Functions (User Input)

Approach:

Import math module using the import keyword.
Give the list as user input using list(),map(),input(),and split() functions.
Store it in a variable.
Give the first number as user input using the float(input()) function and store it in a variable.
Apply math.atan() function to the given first number to get the arc tangent value (inverse of tangent ) of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.atan() function to the given list element and print it.
The Exit of Program.

Below is the implementation:

# Import math module using the import keyword.
import math
# Give the list as user input using list(),map(),input(),and split() functions.
# Store it in a variable.
gvn_lst = list(map(float, input(
    'Enter some random List Elements separated by spaces = ').split()))
# Give the first number as user input using the float(input()) function
# and store it in a variable.
gvn_numb1 = float(input("Enter some random number = "))
# Apply math.atan() function to the given first number to get arc tangent value
# (inverse of tangent) of a given number.
# Store it in another variable.
fnl_rslt = math.atan(gvn_numb1)
print("The result after applying atan() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = float(input("Enter some random number = "))
print("The result after applying atan() function on above given second number",
      gvn_numb2, " = ", math.atan(gvn_numb2))
# Apply math.atan() function to the given list element and print it.
print(
    "The result after applying atan() function on given list element gvnlst[2] = ", math.atan(gvn_lst[2]))

Output:

Enter some random List Elements separated by spaces = 0 2 0.9 1 -3
Enter some random number = -1
The result after applying atan() function on above given first number -1.0 = -0.7853981633974483
Enter some random number = 0.3
The result after applying atan() function on above given second number 0.3 = 0.2914567944778671
The result after applying atan() function on given list element gvnlst[2] = 0.7328151017865066

Know all about Mathematical Functions in Python by going through our Python Mathematical Methods Examples well explained step by step.