About the Scientific Calculator
Besides basic arithmetic, this scientific calculator supports sin, cos, tan, sin⁻¹, cos⁻¹, tan⁻¹, log (base 10) and ln (natural log), √, x², xʸ and n!, plus the constants π and e. Type a whole expression and press = to evaluate it in the correct order of operations; the previous result is available as ANS.
Switch between DEG (degrees) and RAD (radians) for trigonometry. Your angle setting and history are saved on this device.
How to use
- Choose the angle unit at the top: DEG (degrees) or RAD (radians). It only affects trig functions.
- Enter an expression with the buttons or your keyboard, for example
2sin(30)+√(16),2^10or5!. - The result previews in grey as you type. Press = (Enter) to confirm it and save it to the history.
- Press ANS to reuse the last result. Tap a history entry to load its expression again.
Supported functions and how to type them
| Function | Button | Keyboard |
|---|---|---|
| Powers | xʸ, x² | 2^10, 3² |
| Square root | √ | sqrt(2) or √(2) |
| Factorial | n! | 5! |
| Common log (base 10) | log | log(100) |
| Natural log (base e) | ln | ln(2) |
| Inverse trig | sin⁻¹ etc. | asin(0.5) |
| Pi and e | π, e | pi, e |
| Percent | — | 50% (= 0.5) |
Implicit multiplication works: 2π, 3(4+1) and 2sin(30) are all multiplied. Missing closing parentheses are added automatically at the end.
Order of operations
- Parentheses
- Functions (sin, log, √ …) and !, ²
- Exponents ^ (right to left: 2^3^2 = 2^9 = 512)
- Negation (−)
- Multiplication and division
- Addition and subtraction
So −2^2 = −4; to square −2 write (−2)^2 = 4. A function applies only to the value right after it, so sin(30)² is (sin 30°)² = 0.25.
Degrees vs. radians
A full turn is 360° in degrees and 2π in radians, so 180° = π rad. In DEG mode sin(30) = 0.5; in RAD mode it is the sine of 30 radians, −0.988…. School geometry problems usually use degrees; calculus and physics formulas use radians.
FAQ
Does sin(180) show a tiny number instead of 0?
Computers produce rounding errors like 1.2e-16, but this calculator cleans up tiny trig errors and shows exactly 0. Undefined values such as tan(90°) show an error message.
How precise are the results?
Results are shown to 12 significant digits. Very large or very small results are shown in scientific notation, e.g. 1.5e20.
How large a factorial can it calculate?
Whole numbers from 0 to 170. 171! and above exceed the range of numbers a browser can represent.
Why doesn’t the phone keyboard pop up?
All functions are on the on-screen keypad, so the phone keyboard is kept hidden. Tap the expression to move the cursor, then tap buttons to insert at that position.