PHP atanh( ) Function

PHP atan2( ) Function

Last Updated : 22 Jun, 2023

The atan2() function is a builtin function in PHP and is used to calculate the arc tangent of two variables x and y passed to it as arguments. The function returns the result in radians, which is between -Pi and Pi (inclusive). Syntax:

float atan2($y, $x)

Parameters: This function accepts two parameters and are described below:

$y: This parameter specifies the dividend.
$x: This parameter specifies the divisor.

Return Value: It returns a float value which is the arc tangent of y/x in radians. Examples:

Input : atan2(0.50, 0.50)
Output : 0.78539816339745

Input : atan2(-0.50, -0.50)
Output : -2.3561944901923

Input : atan2(5, 5) 
Output : 0.78539816339745

Input : atan2(10, 20) 
Output : 0.46364760900081

Below programs, taking different values of the parameters are used to illustrate the atan2() function in PHP:

When (0.50, 0.50) is passed as a parameter:

PHP

<?php

echo (atan2(0.50, 0.50));

?>

Output:

0.78539816339745

When (-0.50, -0.50) is passed as a parameter:

PHP

<?php

echo (atan2(-0.50, -0.50));

?>

Output:

-2.3561944901923

When (5, 5) is passed as a parameter:

PHP

<?php

echo (atan2(5, 5));

?>

Output:

0.78539816339745

When (10, 20) is passed as a parameter:

PHP

<?php

echo (atan2(10, 20));

?>

Output:

0.46364760900081

Reference

http://php.net/manual/en/function.atan2.php

PHP atanh( ) Function

S

Shubrodeep Banerjee

Improve

Article Tags :

Practice Tags :

Misc

Similar Reads

PHP atan( ) Function

Trigonometry is an important part of mathematics and PHPâ€™s math functions provides us with some functions which are very useful for calculations involving trigonometry. One of such function is atan() function. The atan() function in PHP is used to find the arc tangent of an argument passed to it whi

PHP atanh( ) Function

In mathematics, the inverse hyperbolic functions are the inverse functions of the hyperbolic functions. For a given value of a hyperbolic function, the corresponding inverse hyperbolic function provides the corresponding hyperbolic angle. PHP provides us with builtin functions for inverse hyperbolic

PHP asin( ) Function

Trigonometry is an important part of mathematics and PHPâ€™s math functions provides us with some functions which are very useful for calculations involving trigonometry. One of such function is asin() function. The asin() function in PHP is used to find the arc sine of a number in radians. We already

PHP array() Function

The array() function is an inbuilt function in PHP which is used to create an array. There are three types of array in PHP: Indexed array: The array which contains numeric index. Syntax: array( val1, val2, val3, ... ) Associative array: The array which contains name as keys. Syntax: array( key=>v

PHP | fstat( ) Function

The fstat() function in PHP is an inbuilt function which is used to return information about an open file. The file name is sent as a parameter to the fstat() function and it returns an array with the following elements : Numeric Associative Description 0 dev Device number 1 ino inode number* 2 mode

PHP end() Function

The end() function is an inbuilt function in PHP and is used to find the last element of the given array. The end() function changes the internal pointer of an array to point to the last element and returns the value of the last element.Syntax:end($array)Parameters:This function accepts a single par

PHP constant() Function

The constant() function returns the value of a constant. It also works with class constants. Syntax: constant(constant) Parameter Values: constant: It is a required value that specifies the value of the constant. Return Value: It returns the value of a constant if the constant is defined else return

PHP | floatval() Function

The floatval() function is an inbuilt function in PHP which returns the float value of a variable. Syntax: float floatval ( $var ) Parameters: This function accepts one parameter which is mandatory and described below: $var: The variable whose corresponding float value will be returned. This variabl

PHP abs() Function

The abs() function is an inbuilt function in PHP which is used to return the absolute (positive) value of a number. The abs() function in PHP is identical to what we call modulus in mathematics. The modulus or absolute value of a negative number is positive. Syntaxnumber abs( value )ParametersThe ab

PHP Array Functions

Arrays are one of the fundamental data structures in PHP. They are widely used to store multiple values in a single variable and can store different types of data, such as strings, integers, and even other arrays. PHP offers a large set of built-in functions to perform various operations on arrays.