asin — Returns the calculated arcsine of the given
float fl: Base value
Arcsine of a number
asin() calculates the arcsine of a value.
Example 662. Calculate the
arcsine of a value
$sin = 0.75;
echo "The arcsine of $sin is ", asin($sin);
PHP Functions Essential Reference. Copyright © 2002 by New Riders Publishing
(Authors: Zak Greant, Graeme Merrall, Torben Wilson, Brett Michlitsch).
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