# Documentation for sub cos

Documentation for sub cos, assembled from the following types:

# class Cool

From Cool

## (Cool) routine cos

Defined as:

sub cos(Numeric(Cool))method cos()

Coerces the invocant (or in sub form, the argument) to Numeric, interprets it as radians, returns its cosine.

say 0.cos; # OUTPUT: «1»say pi.cos; # OUTPUT: «-1»say cos(pi/2); # OUTPUT: «6.12323399573677e-17»