Inverse hyperbolic cosine
Syntax
acosh ( float $arg ) : float
Parameters
arg
The value to process
Return
The inverse hyperbolic cosine of arg
Examples
1
<? $arg = cosh(deg2rad(0)); $return = acosh($arg); echo $return; ?>
0
2
<?
for ($i = -180; $i <= 180; ++$i) {
$arg = cosh(deg2rad($i));
$return = acosh($arg);
echo $return . PHP_EOL;
}
?>
3.1415926535898 3.1241393610699 3.1066860685499 3.08923277603 3.07177948351 3.0543261909901 3.0368728984701 3.0194196059502 3.0019663134302 2.9845130209103 2.9670597283904 2.9496064358704 2.9321531433505 2.9146998508305 2.8972465583106 2.8797932657906 2.8623399732707 2.8448866807508 2.8274333882308 2.8099800957109 2.7925268031909 2.775073510671 2.757620218151 2.7401669256311 2.7227136331112 2.7052603405912 2.6878070480713 2.6703537555513 2.6529004630314 2.6354471705114 2.6179938779915 2.6005405854716 2.5830872929516 2.5656340004317 2.5481807079117 2.5307274153918 2.5132741228718 2.4958208303519 2.4783675378319 2.460914245312 2.4434609527921 2.4260076602721 2.4085543677522 2.3911010752322 2.3736477827123 2.3561944901923 2.3387411976724 2.3212879051525 2.3038346126325 2.2863813201126 2.2689280275926 2.2514747350727 2.2340214425527 2.2165681500328 2.1991148575129 2.1816615649929 2.164208272473 2.146754979953 2.1293016874331 2.1118483949131 2.0943951023932 2.0769418098733 2.0594885173533 2.0420352248334 2.0245819323134 2.0071286397935 1.9896753472735 1.9722220547536 1.9547687622336 1.9373154697137 1.9198621771938 1.9024088846738 1.8849555921539 1.8675022996339 1.850049007114 1.832595714594 1.8151424220741 1.7976891295542 1.7802358370342 1.7627825445143 1.7453292519943 1.7278759594744 1.7104226669544 1.6929693744345 1.6755160819146 1.6580627893946 1.6406094968747 1.6231562043547 1.6057029118348 1.5882496193148 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 0.7679448708775 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 0.069813170079772 0.052359877559828 0.034906585039886 0.017453292519938 0 0.017453292519938 0.034906585039886 0.052359877559828 0.069813170079772 0.087266462599717 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 0.82030474843734 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 1.5882496193148 1.6057029118348 1.6231562043547 1.6406094968747 1.6580627893946 1.6755160819146 1.6929693744345 1.7104226669544 1.7278759594744 1.7453292519943 1.7627825445143 1.7802358370342 1.7976891295542 1.8151424220741 1.832595714594 1.850049007114 1.8675022996339 1.8849555921539 1.9024088846738 1.9198621771938 1.9373154697137 1.9547687622336 1.9722220547536 1.9896753472735 2.0071286397935 2.0245819323134 2.0420352248334 2.0594885173533 2.0769418098733 2.0943951023932 2.1118483949131 2.1293016874331 2.146754979953 2.164208272473 2.1816615649929 2.1991148575129 2.2165681500328 2.2340214425527 2.2514747350727 2.2689280275926 2.2863813201126 2.3038346126325 2.3212879051525 2.3387411976724 2.3561944901923 2.3736477827123 2.3911010752322 2.4085543677522 2.4260076602721 2.4434609527921 2.460914245312 2.4783675378319 2.4958208303519 2.5132741228718 2.5307274153918 2.5481807079117 2.5656340004317 2.5830872929516 2.6005405854716 2.6179938779915 2.6354471705114 2.6529004630314 2.6703537555513 2.6878070480713 2.7052603405912 2.7227136331112 2.7401669256311 2.757620218151 2.775073510671 2.7925268031909 2.8099800957109 2.8274333882308 2.8448866807508 2.8623399732707 2.8797932657906 2.8972465583106 2.9146998508305 2.9321531433505 2.9496064358704 2.9670597283904 2.9845130209103 3.0019663134302 3.0194196059502 3.0368728984701 3.0543261909901 3.07177948351 3.08923277603 3.1066860685499 3.1241393610699 3.1415926535898
