Manual

Reference

Modules

  • A • B • C • D • E
  • F • G • H • I • L
  • M • N • O • P • S
  • T • U • X

Tools

cos

Perl 5 version 26.0 documentation
Go to top
Show recent pages
Recently read

cos

Perl functions A-Z | Perl functions by category | The 'perlfunc' manpage
  • cos EXPR

  • cos

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

    For the inverse cosine operation, you may use the Math::Trig::acos function, or use this relation:

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