NAG CL Interface
X02AHC (sinarg_​max)

X02AHC returns the largest positive argument for which the C compiler run-time library functions sin and cos return a result with some meaningful accuracy.

The function may be called by the names: x02ahc, nag_machine_sinarg_max or nag_max_sine_argument.

X02AHC is a constant defined in the C Header file.

The trigonometric functions $\sin$ and $\cos$ supplied in some compiler run-time libraries do not return accurate results when their argument is large. Often the related accuracy of a result gets progressively worse as the argument gets larger. X02AHC gives a value beyond which the compiler run-time library returns results with no relative accuracy at all. Note that some run-time libraries do return accurate results for all arguments to $\sin$ and $\cos$.

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X02AHC is not threaded in any implementation.

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