__device__ double acosh ( double  x  ) 

Calculate the nonnegative arc hyperbolic cosine of the input argument x (measured in radians).

Returns:
Result will be in the interval [0, $+\infty$].
  • acosh(1) returns 0.
  • acosh(x) returns NaN for x in the interval [$-\infty$, 1).
Note:
For accuracy information for this function see the CUDA C Programming Guide, Appendix C, Table C-2.


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