I suspect on most CPUs, it just uses the sin and cos opcodes of the native CPU. Implementing sin in terms of cos (or vice-versa) is just asking for problems, like the well-known results being a little off, since pi/2 cannot be exactly represented as a float (or as anything else in finite RAM).

In reply to Re^4: Perl oddities by theorbtwo
in thread Perl oddities by brian_d_foy

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