Calculates the inverse hyperbolic sine of a number.
What Is asinh() in PHP?
Calculates the inverse hyperbolic sine of a number.
Its syntax is:
asinh(float $num): floatParameters:
$num— Accepted as float; required argument.
Return type: float. Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
Availability: Available in standard PHP.
Example 1: Basic Usage
<?php
echo asinh(0);
Output:
0Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
Example 2: A Different Input
<?php
echo round(asinh(1), 5);
Output:
0.88137Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
Practical Example: Applying It in a Program
<?php
$values = [-2, 0, 2];
foreach ($values as $value) { echo round(asinh($value), 3) . PHP_EOL; }
Output:
-1.444
0
1.444Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
Important Behavior and Edge Cases
- Key behavior: Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
- Environment: Available in standard PHP.
Comparison With Related Functions
| Function | Purpose |
|---|---|
asinh() | calculates the inverse hyperbolic sine of a number. |
asin() | asin() calculates inverse ordinary sine over -1 to 1; asinh() calculates inverse hyperbolic sine. |
Common Beginner Mistakes
| Mistake | Correct Approach |
|---|---|
| Ignoring this behavior: Accepts both positive and negative inputs | Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine. |
Key Takeaways
- calculates the inverse hyperbolic sine of a number.
- Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.
- Available in standard PHP.
Summary: Accepts both positive and negative inputs. Do not confuse it with asin(), the inverse ordinary sine.