Sine and Cosine Accuracy

[Paul Koning]

>>>>> "Kevin" == Kevin Handy <kth@srv.net> writes:

 Kevin> But, you are using a number in the range of 2^90, only have 64
 Kevin> bits for storing the floating point representation, and some
 Kevin> of that is needed for the exponent.

Fair enough, so with 64 bit floats you have no right to expect an
accurate answer for sin(2^90).  However, you DO have a right to expect
an answer in the range [-1,+1] rather than the 1.2e+27 that Richard
quoted.  I see no words in the description of
-funsafe-math-optimizations to lead me to expect such a result.

	    paul