Key Reference

Complete reference for every key on the TI-84 Calculator Online.

F-Keys (Top Row)

KEY FUNCTION KEYBOARD
Y= Opens function editor
WINDOW Set graph window parameters
ZOOM Zoom in/out on graph
TRACE Trace along a graphed function
GRAPH Display the graph

Control Keys

KEY FUNCTION KEYBOARD
2nd Activates secondary (blue) function of next key pressed Glows blue when active
MODE Toggle DEG/RAD. 2nd+MODE clears screen
DEL / INS Delete character at cursor. 2nd+DEL = insert mode Backspace on keyboard
CLEAR Clear expression. Double-press clears history Escape key
ENTER Evaluate expression Enter / Return key
ON Reset / power. 2nd+ON = off mode

Navigation (D-Pad)

KEY FUNCTION KEYBOARD
▲ Up Scroll back through calculation history Arrow Up
▼ Down Scroll forward through history Arrow Down
◄ Left Move cursor left Arrow Left
► Right Move cursor right Arrow Right
Center

Math Functions

KEY FUNCTION KEYBOARD
Square the current value
2nd + x² √( — Square root
^ Raise to power. Example: 2^8
2nd + ^ Insert π (~3.14159)
log Base-10 logarithm
ln Natural logarithm
STO Store answer to memory
2nd + STO RCL — Recall from memory

Trigonometry

KEY FUNCTION KEYBOARD
sin Sine function
2nd + sin sin⁻¹ — Inverse sine (arcsine)
cos Cosine function
2nd + cos cos⁻¹ — Inverse cosine
tan Tangent function
2nd + tan tan⁻¹ — Inverse tangent

Number Keys

KEY FUNCTION KEYBOARD
0 – 9 Digit input Keyboard 0-9
. Decimal point Period key
(-) Negative sign (not minus)
( ) Parentheses for grouping ( and ) keys
÷ × − + Arithmetic operators / * - + keys
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