ACH |
ach returns its parameter's hyperbolic arc-cosine.
ach(num_exp)
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Element |
Description |
Restrictions |
|
num_exp |
Numeric Expression |
1<= exp_num<= 10^40 |
Y = ach(3*X)
ach(X) returns ln(X+sqr(X*X-1)).
ach is the inverse of the ch function.
The result is the Double type.
|
Error |
Description |
|
ERMODE (10) |
The parameter is not numeric. |
|
ERTRIH (15) |
The parameter is less than one (1). |
|
ERHUGE (13) |
The parameter is too large. |
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