What is the difference between basic and scientific calculator modes?

Basic calculator mode provides standard arithmetic operations including addition, subtraction, multiplication, division, percentages, and square roots. Scientific calculator mode adds advanced mathematical functions including trigonometry (sin, cos, tan), logarithms (log, ln), exponentials, factorials, powers, and parentheses for complex expressions. Switch between modes based on your calculation needs—basic for everyday math, scientific for advanced mathematics, engineering, or physics problems.

How do I use trigonometric functions on the calculator?

Switch to scientific mode to access trigonometric functions including sine, cosine, tangent, and their inverses. Enter your angle value first, then click the desired trig function button. By default, calculations use degrees, but you can switch to radians mode if needed. For example, to calculate sin of 30 degrees, enter 30 then click sin button. The calculator handles both direct trig functions and inverse functions like arcsin, arccos, and arctan for solving angles.

Can I use keyboard shortcuts to operate the calculator?

Yes! The calculator supports keyboard input for faster calculations. Use number keys 0-9 for digits, standard operator keys for arithmetic operations, Enter or equals key to calculate results, Backspace to delete the last character, Escape or C to clear the display, and parentheses keys for grouping operations. Keyboard support makes the calculator feel like a native application and significantly speeds up complex calculations compared to clicking buttons.

How do I calculate percentages with this calculator?

To calculate percentages, enter the base number, press the multiplication operator, enter the percentage value, then press the percent button or symbol. For example, to find 20% of 150, enter 150, multiply, 20, then percent to get 30. You can also calculate percentage increase or decrease by adding or subtracting the percentage result. The calculator handles percentage operations in both basic and scientific modes.

What is the order of operations (PEMDAS) and how does the calculator handle it?

The calculator follows standard mathematical order of operations: Parentheses, Exponents, Multiplication and Division (left to right), Addition and Subtraction (left to right). This ensures calculations produce mathematically correct results. For example, 2 + 3 × 4 equals 14, not 20, because multiplication happens before addition. Use parentheses to override the default order. The calculator automatically applies these rules, so you get accurate results for complex expressions.

Can I use the calculator for logarithms and exponentials?

Yes! Scientific mode includes logarithm functions for both common logarithms (base 10, log button) and natural logarithms (base e, ln button). For exponentials, use the power function or the e^x button for natural exponentials. To calculate log base other than 10 or e, use the change of base formula: log_b(x) = ln(x) / ln(b). These functions are essential for scientific calculations, exponential growth/decay problems, and engineering applications.

How accurate are the calculator results?

The calculator uses JavaScript floating-point arithmetic with double-precision (64-bit) numbers, providing approximately 15-17 significant digits of accuracy. This is sufficient for most practical calculations. However, like all computer arithmetic, very large numbers, very small numbers, or operations involving many decimal places may experience minor rounding errors due to binary representation limitations. For critical calculations requiring arbitrary precision, consider using specialized mathematical software.

Can I copy or save my calculation results?

Yes! You can select and copy the result displayed on the calculator screen using standard text selection and copy commands (Ctrl+C or Cmd+C). The calculator maintains your current calculation on screen until you clear it or start a new calculation, allowing you to reference previous results. For keeping a history of multiple calculations, consider writing them down or using the calculator alongside a note-taking application.

Does the calculator work on mobile devices and tablets?

Absolutely! The calculator is fully responsive and optimized for mobile devices and tablets. The button layout adapts to smaller screens while remaining easy to use with touch input. All features available on desktop are also available on mobile, including both basic and scientific modes. The touch-optimized buttons are sized appropriately for finger taps, and the calculator works in both portrait and landscape orientations for maximum convenience.

What should I do if the calculator displays an error or unexpected result?

Common calculator errors include division by zero (displays infinity or error), invalid operations like square root of negative numbers in real mode, or syntax errors from incomplete expressions. If you see an unexpected result, check your input for typos, verify parentheses are balanced, ensure proper order of operations, and confirm you are in the correct mode (degrees vs radians for trig functions). Press clear to reset the calculator and start fresh if needed.

Free Online Calculator

Advanced calculator with basic and scientific modes. Perform arithmetic operations, trigonometry, logarithms, and more. Perfect for students and professionals.

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