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Beginning in SAS 9.2, you can compute the inverse of the hyperbolic sine, cosine, and tangent using the ARSINH, ARCOSH, and ARTANH functions in the DATA step, respectively. Using these functions, you can compute the inverse hyperbolic secant at x as ARCOSH(1/x), the inverse hyperbolic cosecant at x as ARSINH(1/x), and the inverse hyperbolic cotangent at x as ARTANH(1/x).
Prior to SAS 9.2, these quantities can be computed using existing SAS functions in the DATA step as shown below:
Inverse hyperbolic sine: | log(x+sqrt(x**2+1)) |
Inverse hyperbolic cosine: | log(x+sqrt(x**2-1)) |
Inverse hyperbolic tangent: | 0.5*log((1+x)/(1-x)) |
where x is the SINH, COSH, or TANH value.
Product Family | Product | System | SAS Release | |
Reported | Fixed* | |||
SAS System | Base SAS | All | n/a |