[cfp-interest 3592] csinh

[Fred J. Tydeman]

C23: G.6.3.5 The csinh functions has these two requirements:

- csinh(+0 + iNaN) returns ±0 + iNaN (where the sign of the real part of the result is unspeci-
fied).

- csinh(NaN + i0) returns NaN + i0.

Since csinh( x + I*y ) == sinh(x)*cos(y) + I*cosh(x)*sin(y)

It seems to me that the last case should be:

- csinh(NaN + i0) returns NaN +/- i0
(where the sign of the imaginary part of the result is unspeci-
fied). 


---
Fred J. Tydeman        Tydeman Consulting
tydeman at tybor.com      Testing, numerics, programming
+1 (702) 608-6093      Vice-chair of INCITS/C (ANSI "C")
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