Cosine function

Daftar Isi

• 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:

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