PHP tanh()函数

PHP tanh() 函数是预定义的三角函数。它用于返回一个数的双曲正切值。它等于sinh(x)/cos(x)。

语法

        float cosh ( float $arg );

示例1

<?php
  n=4;
  echo "Your number is:".n;
  echo "<br>"."By using 'tanh()' function your value is:".tanh($n)."<br>";
?>

输出：

Your number is:4
By using 'tanh()' function your value is:0.99932929973907

示例2

<?php
  n=(-4);
  echo "Your number is:".n;
  echo "<br>"."By using 'tanh()' function your value is:".tanh($n)."<br>";
?>

输出：

Your number is:-4
By using 'tanh()' function your value is:-0.99932929973907

示例3

<?php
  n=(0.50);
  echo "Your number is:".n;
  echo "<br>"."By using 'tanh()' function your value is:".tanh($n)."<br>";
?>

输出结果:

Your number is:0.5
By using 'tanh()' function your value is:0.46211715726001

示例4

<?php
  n=(-0.50);
  echo "Your number is:".n;
  echo "<br>"."By using 'tanh()' function your value is:".tanh($n)."<br>";
?>

输出：

Your number is:-0.5
By using 'tanh()' function your value is:-0.46211715726001

示例5

<?php
  n=(M_PI_4);
  echo "Your number is: M_PI_4";
  echo "<br>"."By using 'tanh()' function your value is:".tanh(n)."<br>";
?>

输出：

Your number is: M_PI_4
By using 'tanh()' function your value is:0.65579420263267