   #PHP Manual Mathematical Functions abs acosh

   PHP Manual
   Prev  Next
   ______________________________________________________________________

                                     acos

   (PHP 3, PHP 4 )
   acos -- Arc cosine

Description

   float acos ( float arg)

   Returns the arc cosine of arg in radians. acos() is the complementary
   function of cos(), which means that a==cos(acos(a)) for every value of
   a that is within acos()' range.

   See also acosh(), asin() and atan().
   ______________________________________________________________________

   Prev Home  Next
   abs   Up  acosh
