Name
cos
Synopsis
cos num
Returns the cosine of num
(expressed in radians). For the inverse cosine operation, you may
use the POSIX::acos( )
function, or use this relation:
sub acos { atan2( sqrt(1 - $_[0] * $_[0]), $_[0] ) }Get Perl in a Nutshell, 2nd Edition now with the O’Reilly learning platform.
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