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acosec
Combined from primary sources listed below.

In Cool§

See primary documentation in context for routine acosec. 

sub acosec(Numeric(Cool))
method acosec()

Coerces the invocant (or in sub form, its argument) to Numeric, and returns its arc-cosecant in radians.

say 45.acosec;              # OUTPUT: «0.0222240516182672␤»
say acosec(45)              # OUTPUT: «0.0222240516182672␤»