× π/180 before sin/cos/tan; RAD uses radians directly. 2nd swaps in inverse trig and eˣ / 10ˣ. % divides by 100; EXP is scientific notation.
50% = 0.5); EXP enters scientific notation (e.g. 1.5 EXP 3 = 1500).
Unlike a basic four-function calculator, expressions here are tokenized and evaluated with proper mathematical operator precedence — multiplication and division happen before addition and subtraction, and parentheses group sub-expressions correctly, rather than evaluating strictly left to right.
DEG and RAD modes control how trigonometric functions interpret their input: DEG mode converts your entered angle to radians first (multiplying by π/180) before computing sin, cos, or tan, while RAD mode uses your input directly as radians, matching how most programming languages and higher mathematics handle angles.
The 2nd key swaps the trig and exponential buttons for their inverses — sin/cos/tan become arcsin/arccos/arctan, and eˣ/10ˣ become their corresponding logarithms. The % key divides by 100 as expected, and EXP enters a number in scientific notation (like 1.5 EXP 3 for 1.5 × 10³).
DEG mode expects angles in degrees and converts them to radians internally before computing trig functions. RAD mode expects radians directly, with no conversion. Most everyday and classroom use wants DEG; radians are standard in higher mathematics, physics, and programming.
Yes — expressions are tokenized and evaluated with standard mathematical precedence (multiplication and division before addition and subtraction, parentheses first), the same rules taught in school algebra, rather than a strict left-to-right evaluation.
It swaps certain buttons for their inverse function — sin becomes arcsin, cos becomes arccos, tan becomes arctan, and the exponential buttons switch to their corresponding logarithms.
Use the EXP key — for example, typing 1.5, then EXP, then 3, enters 1.5 × 10³ (1500).