`asinh`

, `asinhf`

---inverse hyperbolic sine#include <math.h> double asinh(doublex); float asinhf(floatx);

**Description**

`asinh`

calculates the inverse hyperbolic sine of `x`.
`asinh`

is defined as

`asinhf`

is identical, other than taking and returning floats.

**Returns**

`asinh`

and `asinhf`

return the calculated value.

**Portability**

Neither `asinh`

nor `asinhf`

are ANSI C.

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