Scientific Calculator Guide: Functions, Logs & Trigonometry
A scientific calculator handles the mathematics of physics, engineering, and higher algebra. Here's a clear reference for its most important functions.
Key Scientific Functions
| Function | Button | Example |
|---|---|---|
| Square root | √ | √144 = 12 |
| Power | xʸ or ^ | 2^10 = 1024 |
| Log base 10 | log | log(1000) = 3 |
| Natural log | ln | ln(e) = 1 |
| Sine | sin | sin(30°) = 0.5 |
| Cosine | cos | cos(60°) = 0.5 |
| Tangent | tan | tan(45°) = 1 |
| Factorial | n! | 6! = 720 |
Order of Operations (BODMAS)
Frequently Asked Questions
What is a scientific calculator used for?
A scientific calculator performs advanced mathematical functions beyond basic arithmetic — trigonometry (sin, cos, tan), logarithms, exponentials, factorials, square roots, powers, and more. Used in physics, engineering, chemistry, and higher mathematics.
What is the order of operations (BODMAS/PEMDAS)?
Mathematical operations follow a strict order: Brackets/Parentheses first, then Orders/Exponents, then Division and Multiplication (left to right), then Addition and Subtraction (left to right). 2 + 3 × 4 = 2 + 12 = 14 (not 20).
What is a logarithm?
A logarithm (log) is the inverse of an exponent. log₁₀(x) asks: 10 to what power gives x? log₁₀(1000) = 3 because 10³ = 1000. The natural log ln(x) uses base e (≈2.718). Logarithms are used in sound (decibels), earthquakes (Richter scale), and finance.
What is the difference between sin, cos, and tan?
In a right-angled triangle: sin(θ) = opposite ÷ hypotenuse, cos(θ) = adjacent ÷ hypotenuse, tan(θ) = opposite ÷ adjacent. Calculators work in degrees (°) or radians (rad) — ensure you're using the correct mode.
What does the e key on a scientific calculator do?
The e key is Euler's number ≈ 2.71828... It is the base of natural logarithms. e^x calculates exponential growth. It appears in compound interest (continuous compounding), population growth, and physics.
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Open Scientific Calculator
Full scientific calculator with trig, log, powers, factorial — and keyboard input support.
Open Scientific Calculator