Author rhettinger
Recipients davin, mark.dickinson, rhettinger, serhiy.storchaka, tim.peters
Date 2017-10-01.17:53:44
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I would have thought this would be a straight pass-through to the underlying hardware FPU tan() instruction so that it would give the same answer for the same hardware regardless of O/S.

Perhaps we're seeing a software-only implementation (using CORDIC or somesuch).  If so, inputs close to a singularity are the place where the implementation is likely to fall apart (the relative error in this example is 1.000004001955473).

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