Comment #11 on issue 3006 by [email protected]: Inaccurate sin/cos values
http://code.google.com/p/v8/issues/detail?id=3006

This discussion leads nowhere. I will invest some time to see whether table lookup with Taylor series will yield results closer to the ones you expect and still be reasonably fast. But given that the ECMA script spec is very vague about this, I don't see the need to mimic one approximation with another, especially when neither can claim to be anything close to accurate in corner cases. I'm not convinced that Math.cos(Math.pow(2,120)) needs to be 0.47796506772457525.

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