Trigonometric
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Up to Math - Gateway topic to math and numeric processing routines.
See also Floating point math - Floating point math (including complex numbers)
(Perl delta 5.003 to 5.004) Math::Trig No qualified books.
(Perl builtin function) atan2 Y,X Returns the arctangent of Y/X in the range -PI to PI.
(Perl builtin function) cos EXPR Returns the cosine of EXPR (expressed in radians).
(Perl builtin function) sin EXPR Returns the sine of EXPR (expressed in radians).
Math::Trig - Perl already provides trig functions for you, but the inverse and hyperbolic trigonometric functions require either the POSIX module or Math::Trig. [Perl] {oss}
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