Python Program for cos() Function

In the previous article, we have discussed Python Program for atan2() Function
cos() Function in Python:

The cosine of a number is returned by the math.cos() method.

The Trigonometry Cosine function’s mathematical formula is

cos(A)= adjacent side of A/ Hypotenuse

Syntax:

math.cos(x)

Parameters:

x: This is required. It is a number. A number for which the cosine must be calculated. If the value is not a number, a TypeError is returned.

Return Value:

Returns a float value ranging from -1 to 1 that represents the cosine of an angle.

The cos() function returns the Cosine value if the number argument is positive or negative.
The cos() function returns TypeError if it is not a number.

Examples:

Example1:

Input:

Given first number = 1
Given second number = 45

Output:

The result after applying cos() function on above given first number 1  =  0.5403023058681398
The result after applying cos() function on above given second number 45  =  0.5253219888177297

Example2:

Input:

Given first number = 60
Given second number = 10

Output:

The result after applying cos() function on above given first number 60  =  -0.9524129804151563
The result after applying cos() function on above given second number 10  =  -0.8390715290764524

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 (angle) as static input and store it in another variable.
Apply math.cos() function to the given first number to get the cosine value of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.cos() 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 = [10, 15, 20, 30, 35]
# Give the first number as static input and store it in another variable.
gvn_numb1 = 1
# Apply math.cos() function to the given first number to get the cosine value
# of a given number.
# Store it in another variable.
fnl_rslt = math.cos(gvn_numb1)
print("The result after applying cos() function on above given first number",
      gvn_numb1, " = ", fnl_rslt)
# similarly do the same for the other number.
gvn_numb2 = 45
print("The result after applying cos() function on above given second number",
      gvn_numb2, " = ", math.cos(gvn_numb2))
# Apply math.cos() function to the given list element and print it.
print(
    "The result after applying cos() function on given list element gvnlst[1] = ", math.cos(gvn_lst[1]))

Output:

The result after applying cos() function on above given first number 1  =  0.5403023058681398
The result after applying cos() function on above given second number 45  =  0.5253219888177297
The result after applying cos() function on given list element gvnlst[1] =  -0.7596879128588213

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.cos() function to the given first number to get the cosine value of a given number.
Store it in another variable.
Print the above result.
Similarly, do the same for the other number.
Apply math.cos() 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.cos() function to the given first number to get the cosine value
# of a given number.
# Store it in another variable.
fnl_rslt = math.cos(gvn_numb1)
print("The result after applying cos() 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 cos() function on above given second number",
      gvn_numb2, " = ", math.cos(gvn_numb2))
# Apply math.cos() function to the given list element and print it.
print(
    "The result after applying cos() function on given list element gvnlst[2] = ", math.cos(gvn_lst[2]))

Output:

Enter some random List Elements separated by spaces = 10 15 5 6 0
Enter some random number = 60
The result after applying cos() function on above given first number 60.0 = -0.9524129804151563
Enter some random number = 20.5
The result after applying cos() function on above given second number 20.5 = -0.07956356727854007
The result after applying cos() function on given list element gvnlst[2] = 0.28366218546322625

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