MATLAB: Trigonometric functions pi independent support, accurately, atanpi, asinpi, …

Question

Hi,

While in R2018b these functions are supported:

• sinpi Compute sin(X*pi) accurately
• cospi Compute cos(X*pi) accurately

Other related trigonometric functions seems not available like

• tanpi(x) = tan(x*pi) – tangent
• cispi(x) https://en.wikipedia.org/wiki/Cis_(mathematics)
• sincpi(x) = sin(x*pi) / (x*pi) https://en.wikipedia.org/wiki/Sinc_function

and trig inverses like:

• asinpi(x) reverse sine divided by pi, asin/pi or arcsin/pi
• acospi(x) reverse cosine divided by pi, acos(x)/pi or arccos(x)/pi
• atanpi(x)
• atan2pi(x)

Is there a plan to support these, or some toolbox ?

While support seems only for:

• Data Types: single | double
• Complex Number Support: Yes

A big plus would be for half precision, is there any plan to extend it ?

Answer 1

Please submit enhancement requests to Technical Support using the Contact Support link on the Support section of this site if you would find some or all of those functions useful. Please explain how you would use those functions in your enhancement requests -- the more "real world" motivation the enhancement requests have the more interesting they are to the development staff.