How does PHP handle angle measurements in functions like cos() and acos()?

When working with angle measurements in functions like cos() and acos() in PHP, it's important to remember that these functions typically expect the angle to be in radians, not degrees. To convert degrees to radians, you can use the formula radians = degrees * (pi/180). 

// Convert degrees to radians
$degrees = 45;
$radians = $degrees * (pi/180);

// Calculate cosine of the angle in radians
$cosine = cos($radians);

// Calculate arccosine of the cosine value to get the original angle in radians
$original_angle = acos($cosine);

// Convert the angle back to degrees
$original_degrees = $original_angle * (180/pi);

echo "Original angle in degrees: " . $original_degrees;

Keywords

PHP angle measurements cos() acos() functions

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