NAG CL Interface
X02AHC (sinarg_​max)

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1 Purpose

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.

2 Specification

#include <nag.h>
double  X02AHC
The function may be called by the names: x02ahc, nag_machine_sinarg_max or nag_max_sine_argument.

3 Description

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.

4 References


5 Arguments


6 Error Indicators and Warnings


7 Accuracy

Not applicable.

8 Parallelism and Performance

Background information to multithreading can be found in the Multithreading documentation.
X02AHC is not threaded in any implementation.

9 Further Comments


10 Example