PHP Function: rad2deg

In the world of web development, PHP is a popular programming language that allows developers to create dynamic and interactive websites. One of the many useful functions in PHP is the rad2deg function. In this article, we will explore what the rad2deg function does, how it works, and provide some examples of its usage.

What is the rad2deg function?

The rad2deg function in PHP is used to convert an angle from radians to degrees. Radians and degrees are two different units of measuring angles. Radians are the standard unit used in mathematics, while degrees are more commonly used in everyday life.

The rad2deg function takes a single parameter, which is the angle in radians, and returns the equivalent angle in degrees. The syntax for using the rad2deg function is as follows:

float rad2deg ( float $radians )

Here, the parameter $radians is the angle in radians that you want to convert to degrees. The function returns the equivalent angle in degrees as a floating-point number.

How does the rad2deg function work?

The rad2deg function uses a simple mathematical formula to convert an angle from radians to degrees. The formula is:

degrees = radians * (180 / pi)

Where pi is a constant representing the value of pi (approximately 3.14159).

By multiplying the angle in radians by the conversion factor (180 / pi), the rad2deg function calculates the equivalent angle in degrees.

Examples of using the rad2deg function

Let's look at some examples to understand how the rad2deg function works:

Example 1:

$angleInRadians = 1.5708; // 90 degrees in radians
$angleInDegrees = rad2deg($angleInRadians);
echo "Angle in degrees: " . $angleInDegrees;

The output of this code will be:

Angle in degrees: 90

Example 2:

$angleInRadians = 3.14159; // 180 degrees in radians
$angleInDegrees = rad2deg($angleInRadians);
echo "Angle in degrees: " . $angleInDegrees;

The output of this code will be:

Angle in degrees: 180

These examples demonstrate how the rad2deg function can be used to convert angles from radians to degrees.

Summary

The rad2deg function in PHP is a useful tool for converting angles from radians to degrees. It takes an angle in radians as input and returns the equivalent angle in degrees. By using the rad2deg function, developers can easily perform angle conversions in their PHP programs.

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