What is tanh() in PHP?
The tanh() function in PHP returns a number’s hyperbolic tangent in radians.
The following illustration shows the mathematical representation of the tanh() function.
Syntax
tanh(float $num): float
Parameter
This function requires a number that represents an angle in radians as a parameter.
To convert degrees to radians, use:
radians = degrees * ( M_PI / 180.0 )
Return value
tanh() returns the hyperbolic tangent of the number that is sent in as a parameter in radians.
If the value of num is NaN.
Code
<?php#Positive number in radiansecho("tanh(2.3): ");echo (tanh(2.3));?><?php#Negative number in radiansecho("tanh(-2.3): ");echo (tanh(-2.3));?><?php#converting the degrees angle into radians and then applying tanh()#degrees = 45echo("tanh(45 * (M_PI / (180))): ");echo (tanh(45 * (M_PI / (180))));?>
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