The hyperbolic sine (sinh), hyperbolic cosine (cosh) and hyperbolic tangent (tanh) functions and their inverses are found in the catalog.
Press CATALOG. To quickly locate sinh, press S (located above the 3 key). Do not press the purple alpha key. When CATALOG is pressed, the calculator is automatically in alpha mode. The screen items will then jump to the s-listings. Use the down thumb pad arrow key to select sinh(.