Get to the scientific keys

Turn your device sideways. If nothing changes, turn off Portrait Orientation Lock in Control Center.

Glass

Landscape adds six columns of scientific keys beside the usual ones: parentheses, memory and 2nd; powers and EE; roots, ln and rand; trig, π, log and e; hyperbolic trig, |x|, n! and log₂. 2nd flips several of them to a second function.

Vintage

In Standard mode, the portrait keys already include 1/x, √x, x², yˣ, n!, π, ln, eˣ, log and 10ˣ, with more printed above (f) and below (g). Landscape adds a row with sin, cos, tan, x³ and |x|.