Keyboard Special Function Keys The following table indicates the keyboard keys that correspond to Calculator's special function display buttons. Display Button Key deg Ctrl+F8 or D rad Ctrl+F8 or D grad Ctrl+F8 or D x! Ctrl+F9 or ! 1/x Ctrl+F10 or ~ Rnd Ctrl+F11 or R Inv Shift F3 or I sin Shift F4 or S cos Shift F5 or O tan Shift F6 or T log Shift F7 key, or L followed by O ln Shift F8 key, or L followed by N Square Root Shift F9 or Q Y^x Shift F10 or ^ PI P Additional topics: * Performing Arithmetic Functions * Entering Data from the Keyboard * Clearing the Displays * Using Memory * Undoing the Most Recently Performed Function * Exiting Calculator * Using Calculator's Menus * Overview of Calculator