# Convert exponential form to hyperbolic functions

Is there a method to convert expression containing exponentials like (e^a + e^-a) / 2 to hyperbolic functions?
I tried to even call maxima functions directly, but thinks like
```
cosh(a)._maxima_().exponentialize().demoivre()
```

still don't give me `cosh(a)`

back but instead return the form in exponentials.