Scientific Calculator
Advanced calculator with trigonometry, logarithms, powers, and memory functions
Function Reference
Tips
- • Trigonometric functions use degrees (e.g., sin(90) = 1)
- • Swipe horizontally on mobile to access all scientific functions
- • History shows your last 2 calculations
- • Use AC to clear all or ⌫ to delete the last digit
How to Use This Scientific Calculator
- Enter numbers using the keypad or your keyboard (0-9, +, -, *, /)
- Use parentheses to control order of operations
- Access advanced functions: sin, cos, tan, log, ln, sqrt, powers
- Press 2nd to access inverse functions (arcsin, arccos, arctan, e^x, 10^x)
- Toggle DEG/RAD for trigonometry mode; use MC/MR/M+/M- for memory
Example: Calculate sin(45) + ln(10): Enter 45, press sin (gives 0.707 in DEG mode), press +, enter 10, press ln (gives 2.303), press = for 3.010.
Tip: Check your angle mode (DEG vs RAD) before any trig calculation - it's the most common source of 'wrong' answers.
Why Use a Scientific Calculator?
A scientific calculator handles complex math that basic calculators can't - essential for STEM subjects and technical work.
- Complete physics, chemistry, and engineering homework
- Calculate trigonometric values for geometry and surveying
- Work with logarithms and exponentials in science courses
- Verify answers from other calculators or manual work
- Evaluate complex expressions with proper order of operations
- Access mathematical constants (pi and e) with full precision
Understanding Your Results
Results display with up to 10 significant digits. Very large or small numbers show in scientific notation.
| Result | Meaning | Action |
|---|---|---|
| Standard decimal | Normal range number | Direct result - verify reasonableness for your problem |
| Scientific notation (e.g., 1.23e+15) | Very large or small | The 'e' means x10^; 1.23e+15 = 1.23 x 10^15 |
| Error message | Invalid operation | Check for division by zero, sqrt of negative, or domain errors |
Meaning: Normal range number
Action: Direct result - verify reasonableness for your problem
Meaning: Very large or small
Action: The 'e' means x10^; 1.23e+15 = 1.23 x 10^15
Meaning: Invalid operation
Action: Check for division by zero, sqrt of negative, or domain errors
Note: Memory indicator (M) shows when a value is stored. History panel records your calculations.
About Scientific Calculator
Formula
PEMDAS: Parentheses, Exponents, Multiplication/Division, Addition/Subtraction Operations are evaluated in this order. 2 + 3 x 4 = 14, not 20, because multiplication precedes addition.
Current Standards: Trigonometric functions match standard mathematical definitions. DEG mode: 360 degrees per circle. RAD mode: 2*pi radians per circle.
Frequently Asked Questions
What does the 2nd button do?
2nd activates alternate functions on supported buttons. sin becomes arcsin (sin^-1), ln becomes e^x, log becomes 10^x, sqrt becomes cube root, x^2 becomes x^3. A purple '2nd' indicator appears when active. Press 2nd again to deactivate, or it auto-resets after using a function.
When should I use degrees vs radians?
Use degrees (DEG) for everyday angles like 45, 90, or 180 degrees. Use radians (RAD) for calculus, physics equations, and when angles are expressed as multiples of pi. If your answer seems completely wrong, you probably have the wrong mode - sin(90) is 1 in degrees, but 0.894 in radians.
What's the difference between ln and log?
ln is the natural logarithm (base e = 2.718...). log is the common logarithm (base 10). ln is used in calculus and natural growth/decay. log is used for pH, decibels, Richter scale. On some calculators, 'log' without a subscript means log10, but check your context.
How do I calculate compound interest?
Use A = P(1+r/n)^(nt). Enter the inner expression with parentheses, use the x^y button for the power. For $1000 at 5% compounded monthly for 10 years: 1000 x (1 + 0.05/12)^(12x10) = 1000 x 1.004167^120 = $1647.01.
Why does my expression show above the main display?
The top line shows your complete expression as you build it, so you can verify it before pressing equals. This helps catch errors like mismatched parentheses or misplaced operators. After pressing =, it shows 'expression =' while the main display shows the result.