I know. But you can do away with either sin or cos as well - they are the same primitive, just shifted a quarter of a phase. That of course doesn't mean tan couldn't be present. After all, Perl gives us
push, pop, shift and unshift, when they can all be trivially implemented using splice. Perl is a rich language, and any minimal approach is, to quote brian, what I consider exceptions to normal Perl thinking. Normal Perl thinking is "programmer convenience". A minimalistic approach isn't programmer convenience.
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