Build an expression with the keypad or your keyboard, then press = / Enter. The top line shows the expression; the large line is the result. History on the right stores past evaluations—click an entry to reuse its value.
- DEG / RAD controls trig functions (sin, cos, tan and inverses). Match the mode to your problem; the badge above the display shows the current setting.
- 2nd switches labeled keys to alternate functions (e.g. sin → asin, ln → eˣ). Press 2nd again to return.
- Memory: MC clears, MR recalls, M+/M− add or subtract the current result. Ans inserts the last answer into a new expression.
- Keyboard: digits, + − × ÷, parentheses, Enter evaluate, Backspace delete, Esc clear. AC clears everything.