Perl 5 version 32.0
documentation
sin
- 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])) }