-- Perl 5.8.7 documentation --
sin
Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage
  • sin EXPR
  • sin

    Returns the sine of EXPR (expressed in radians). If EXPR is omitted, returns sine of $_ .

    For the inverse sine operation, you may use the Math::Trig::asin function, or use this relation:

        sub asin { atan2($_[0], sqrt(1 - $_[0] * $_[0])) }