How to Use This Calculator
- Select Angle Mode: Toggle DEG (degrees) or RAD (radians) for trigonometry.
- Enter Expressions: Click buttons or use your physical keyboard to enter formulas.
- Execute: Press = or Enter to view the evaluation.
Formula and Calculation Steps
π ≈ 3.1415926535
e ≈ 2.7182818284
sin²(θ) + cos²(θ) = 1Worked Examples and Reference Table
| Expression | Mode | Output |
|---|---|---|
| sin(30) | Degree | 0.5 |
| cos(0) | Degree | 1.0 |
| log(100) | — | 2.0 |
| 5! | — | 120 |
| √(144) | — | 12 |
Frequently Asked Questions
How do I switch between Degrees and Radians?
Use the Deg/Rad toggle button on the keypad. Degrees are typically used in navigation and everyday geometry, while radians are standard in calculus and advanced physics.
What is the difference between log and ln?
The "log" button evaluates common logarithms to base 10 (log₁₀), whereas "ln" evaluates the natural logarithm to base e ≈ 2.71828 (logₑ).
Does this calculator follow standard Order of Operations (PEMDAS)?
Yes. Calculations respect standard mathematical precedence: Parentheses, Exponents, Multiplication & Division (left to right), and Addition & Subtraction (left to right).
What is the maximum factorial this tool can compute?
The calculator can compute exact integers up to 170! (approximately 7.25 × 10³⁰⁶), beyond which numbers exceed standard IEEE 754 floating-point limits.
Can I use keyboard shortcuts on desktop?
Yes. You can type numbers 0–9, basic operators (+, -, *, /), Enter for equal, and Backspace to delete.