asin
Description
Arc sine
Syntax
asin(float $num): float
Parameters
numThe argument to process
Return
The arc sine of num in radians
Examples
1
<? $num = sin(deg2rad(360)); $return = asin($num); echo $return; ?>
-2.4492935982947E-16
2
<?
for($i = 0; $i <= 360; ++$i)
{
$num = sin(deg2rad($i));
$return = asin($num);
echo $return . PHP_EOL;
}
?>0 0.017453292519943 0.034906585039887 0.05235987755983 0.069813170079773 0.087266462599716 0.10471975511966 0.1221730476396 0.13962634015955 0.15707963267949 0.17453292519943 0.19198621771938 0.20943951023932 0.22689280275926 0.24434609527921 0.26179938779915 0.27925268031909 0.29670597283904 0.31415926535898 0.33161255787892 0.34906585039887 0.36651914291881 0.38397243543875 0.4014257279587 0.41887902047864 0.43633231299858 0.45378560551853 0.47123889803847 0.48869219055841 0.50614548307836 0.5235987755983 0.54105206811824 0.55850536063819 0.57595865315813 0.59341194567807 0.61086523819802 0.62831853071796 0.6457718232379 0.66322511575785 0.68067840827779 0.69813170079773 0.71558499331768 0.73303828583762 0.75049157835756 0.7679448708775 0.78539816339745 0.80285145591739 0.82030474843733 0.83775804095728 0.85521133347722 0.87266462599716 0.89011791851711 0.90757121103705 0.92502450355699 0.94247779607694 0.95993108859688 0.97738438111682 0.99483767363677 1.0122909661567 1.0297442586767 1.0471975511966 1.0646508437165 1.0821041362365 1.0995574287564 1.1170107212764 1.1344640137963 1.1519173063163 1.1693705988362 1.1868238913561 1.2042771838761 1.221730476396 1.239183768916 1.2566370614359 1.2740903539559 1.2915436464758 1.3089969389957 1.3264502315157 1.3439035240356 1.3613568165556 1.3788101090755 1.3962634015955 1.4137166941154 1.4311699866354 1.4486232791553 1.4660765716752 1.4835298641952 1.5009831567151 1.5184364492351 1.535889741755 1.553343034275 1.5707963267949 1.553343034275 1.535889741755 1.5184364492351 1.5009831567151 1.4835298641952 1.4660765716752 1.4486232791553 1.4311699866354 1.4137166941154 1.3962634015955 1.3788101090755 1.3613568165556 1.3439035240356 1.3264502315157 1.3089969389957 1.2915436464758 1.2740903539559 1.2566370614359 1.239183768916 1.221730476396 1.2042771838761 1.1868238913561 1.1693705988362 1.1519173063163 1.1344640137963 1.1170107212764 1.0995574287564 1.0821041362365 1.0646508437165 1.0471975511966 1.0297442586767 1.0122909661567 0.99483767363677 0.97738438111682 0.95993108859688 0.94247779607694 0.92502450355699 0.90757121103705 0.89011791851711 0.87266462599716 0.85521133347722 0.83775804095728 0.82030474843734 0.80285145591739 0.78539816339745 0.76794487087751 0.75049157835756 0.73303828583762 0.71558499331768 0.69813170079773 0.68067840827779 0.66322511575785 0.6457718232379 0.62831853071796 0.61086523819802 0.59341194567807 0.57595865315813 0.55850536063819 0.54105206811824 0.5235987755983 0.50614548307836 0.48869219055841 0.47123889803847 0.45378560551853 0.43633231299858 0.41887902047864 0.4014257279587 0.38397243543875 0.36651914291881 0.34906585039887 0.33161255787892 0.31415926535898 0.29670597283904 0.27925268031909 0.26179938779915 0.24434609527921 0.22689280275926 0.20943951023932 0.19198621771938 0.17453292519943 0.15707963267949 0.13962634015955 0.1221730476396 0.10471975511966 0.087266462599717 0.069813170079773 0.05235987755983 0.034906585039887 0.017453292519943 1.2246467991474E-16 -0.017453292519943 -0.034906585039887 -0.05235987755983 -0.069813170079773 -0.087266462599716 -0.10471975511966 -0.1221730476396 -0.13962634015955 -0.15707963267949 -0.17453292519943 -0.19198621771938 -0.20943951023932 -0.22689280275926 -0.24434609527921 -0.26179938779915 -0.27925268031909 -0.29670597283904 -0.31415926535898 -0.33161255787892 -0.34906585039887 -0.36651914291881 -0.38397243543875 -0.4014257279587 -0.41887902047864 -0.43633231299858 -0.45378560551853 -0.47123889803847 -0.48869219055841 -0.50614548307836 -0.5235987755983 -0.54105206811824 -0.55850536063819 -0.57595865315813 -0.59341194567807 -0.61086523819801 -0.62831853071796 -0.6457718232379 -0.66322511575784 -0.68067840827779 -0.69813170079773 -0.71558499331768 -0.73303828583762 -0.75049157835756 -0.76794487087751 -0.78539816339745 -0.80285145591739 -0.82030474843733 -0.83775804095728 -0.85521133347722 -0.87266462599716 -0.89011791851711 -0.90757121103705 -0.92502450355699 -0.94247779607694 -0.95993108859688 -0.97738438111682 -0.99483767363677 -1.0122909661567 -1.0297442586767 -1.0471975511966 -1.0646508437165 -1.0821041362365 -1.0995574287564 -1.1170107212764 -1.1344640137963 -1.1519173063163 -1.1693705988362 -1.1868238913561 -1.2042771838761 -1.221730476396 -1.239183768916 -1.2566370614359 -1.2740903539559 -1.2915436464758 -1.3089969389957 -1.3264502315157 -1.3439035240356 -1.3613568165556 -1.3788101090755 -1.3962634015955 -1.4137166941154 -1.4311699866353 -1.4486232791553 -1.4660765716752 -1.4835298641952 -1.5009831567151 -1.5184364492351 -1.535889741755 -1.553343034275 -1.5707963267949 -1.553343034275 -1.535889741755 -1.5184364492351 -1.5009831567151 -1.4835298641952 -1.4660765716752 -1.4486232791553 -1.4311699866354 -1.4137166941154 -1.3962634015955 -1.3788101090755 -1.3613568165556 -1.3439035240356 -1.3264502315157 -1.3089969389957 -1.2915436464758 -1.2740903539559 -1.2566370614359 -1.239183768916 -1.221730476396 -1.2042771838761 -1.1868238913561 -1.1693705988362 -1.1519173063163 -1.1344640137963 -1.1170107212764 -1.0995574287564 -1.0821041362365 -1.0646508437165 -1.0471975511966 -1.0297442586767 -1.0122909661567 -0.99483767363677 -0.97738438111682 -0.95993108859688 -0.94247779607694 -0.925024503557 -0.90757121103705 -0.89011791851711 -0.87266462599716 -0.85521133347722 -0.83775804095728 -0.82030474843733 -0.80285145591739 -0.78539816339745 -0.76794487087751 -0.75049157835756 -0.73303828583762 -0.71558499331768 -0.69813170079773 -0.68067840827779 -0.66322511575785 -0.6457718232379 -0.62831853071796 -0.61086523819802 -0.59341194567807 -0.57595865315813 -0.55850536063819 -0.54105206811824 -0.5235987755983 -0.50614548307836 -0.48869219055841 -0.47123889803847 -0.45378560551853 -0.43633231299858 -0.41887902047864 -0.4014257279587 -0.38397243543875 -0.36651914291881 -0.34906585039887 -0.33161255787892 -0.31415926535898 -0.29670597283904 -0.27925268031909 -0.26179938779915 -0.24434609527921 -0.22689280275926 -0.20943951023932 -0.19198621771938 -0.17453292519943 -0.15707963267949 -0.13962634015955 -0.1221730476396 -0.10471975511966 -0.087266462599717 -0.069813170079774 -0.05235987755983 -0.034906585039886 -0.017453292519943 -2.4492935982947E-16
