In Chrome Version 33.0.1750.117 the Math.cos() function is returning 
different and less accurate results.  

Specifically Math.cos(-1.89318839074561684476805112354) should be 
-3.16836290305272216816234731596E-1 but is now returning 
-3.16836290305271717215873650275E-1 instead.

This has changed since early February with Chrome version 32.0.1700.102.

I am running on Mac OS X 10.9.1 with 16 GB of memory.

Some more details:  The double hex values involved are:
angle = 0xBFFE4A7FE8F6B56D = -1.89318839074561684476805112354
According to mathematica (or Wolfram Alpha) the result should be: 
-0.31683629030527219006269881180
The nearest double hex value is 0xBFD4470BB84303C9 = 
-3.16836290305272216816234731596E-1
And that is the result I was previously getting in Chrome version 32.

But we are getting now:

0xBFD4470BB84303C0 = -3.16836290305271717215873650275E-1

This is significantly different, and is a problem for my application.

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