`sinh(3)` Evaluate the function. If the value is not a rational number, round your answer to three decimal places.

`sinh(3)`

Take note that hyperbolic sine is defined as

• 
  `sinh(x)=(e^x-e^(-x))/2`

Applying this formula, the expression becomes

`= (e^(3)-e^(-3))/2`

`=e^3/2-e^(-3)/2`

Expressing it with positive exponent only, it turns into

`=e^3/2-1/(2e^3)`

This is the exact value of sinh(3).  

Its approximate value is

`~~10.01787492`

Rounding off to three decimal places, it becomes

`~~10.018`

Therefore, ` sinh(3) ~~ 10.018` .