Python 3 – Number tan() Method
In Python 3, the tan()
method is a mathematical function that returns the tangent value of a given number. The tan()
method is part of the Python math module, which is a built-in module that provides several mathematical functions.
Syntax
The syntax for the tan()
method is as follows:
import math
math.tan(x)
Example
Here is an example program that uses the tan()
method to find the tangent value of a given number:
import math
x = 4
print("The tangent value of", x, "is", math.tan(x))
Output:
The tangent value of 4 is -0.8636911544506166
In this example, we have imported the math
module and assigned a value of 4 to the variable x
. We then use the tan()
method to find the tangent value of x
and print out the result to the console.
Parameters
The tan()
method takes only one parameter, which is the number whose tangent value needs to be calculated. The parameter needs to be a number, either an integer or a float.
Return Value
The tan()
method returns the tangent value of the given number. The return value is a float.
Errors
The tan()
method can return an error if the parameter passed to it is not a number. This error is called a TypeError
and is raised when a non-numerical value is passed to the tan()
method.
Here is an example program where the tan()
method returns a TypeError
:
import math
x = "hello"
print("The tangent value of", x, "is", math.tan(x))
Output:
TypeError: must be real number, not str
In this example, we have assigned the string value “hello” to the variable x
. When we try to find the tangent value of x
using the tan()
method, we get a TypeError
because the parameter passed to the method is not a number.
Conclusion
The tan()
method is a simple mathematical function that returns the tangent value of a given number. It is part of the built-in math module in Python 3 and takes one parameter, which is the number for which the tangent value needs to be calculated. The return value is a float. When using the tan()
method, it is important to ensure that the parameter passed to it is a number, otherwise, a TypeError
will be raised.