These are the sections which describes trigonometric Sine and Cosine functions as well as other sections describing other trigonometric and inverse trigonometric functions, this fail to specify if the arguments are in degree or radians. This built-in ambiguity in the specification can potentially lead to grossly inaccurate results as well as non-interoperable implementation of this part of the standard.

 

3.7.17.53 and 3.17.287

te

Proposed Disposition of DIS 29500 Comment PH-0002 (Modified: 2007-10-17) The unit of arguments and return values that represent angles is the radian. The formulas having such arguments or return values are ACOS, ASIN, ATAN, ATAN2, COS, SIN, and TAN. This will be made explicit in the descriptions of each of these formulas by the addition of the text ", in radians," or ", in radians", as appropriate, as highlighted in the samples below: 3.17.7.50 COS Syntax: COS ( x ) Arguments: Name Type Description x number The value, in radians, whose cosine is to be determined. 3.17.7.4 ACOS Syntax: ACOS ( x ) Return Type and Value: number ­ The arc cosine of x , in radians . Similar Comments: AU-0025 , CA-0048 , CL-0017 , CL-0018 , CL-0019 , CL-0020 , CL-0021 , CL-0022 , CL-0023 , CL-0159 , CL-0166 , CL-0178 , CL-0182 , CO-0159 , CO-0162 , CO-0163 , CO-0164 , CO-0174 , CO-0201 , CO-0202 , DK-0161 , ECMA-0024 , FR-0440 , FR- 0444 , FR-0445 , FR-0446 , FR-0482 , FR-0490 , FR-0505 , GB-0371 , GB-0374 , GB-0375 , GB-0376 , GB-0386 , GB-0424 , GB-0431 , GR-0103 , IE-0007 , IN-0073 , US-0173 , US-0176 , US-0177 , US-0178 , US-0185 , US-0220 , US-0227 , UY-0009