RM G 2 4 19 Accuracy Requirements (GNAT Reference Manual)

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6.62 RM G.2.4(19): Accuracy Requirements ¶

"The versions of the forward trigonometric functions without a Cycle parameter should not be implemented by calling the corresponding version with a Cycle parameter of 2.0*Numerics.Pi, since this will not provide the required accuracy in some portions of the domain. For the same reason, the version of Log without a Base parameter should not be implemented by calling the corresponding version with a Base parameter of Numerics.e."

Followed.