Trigonometric result looks wrong
check DEG/RAD before changing the expression.
Scientific Calculator
Evaluate scientific expressions with a visible angle mode, useful domain errors and a clear distinction between exact constants and floating-point output.
Calculators & ConvertersDirect answer
AppKiro Scientific Calculator evaluates arithmetic, trigonometric and inverse functions, powers, roots, log/ln, factorial, absolute value, exponential notation and constants. It includes DEG/RAD modes, Ans/EE/mod controls and a recent history of up to 20 items in the current interface. DEG and RAD angle modes.
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Keyboard supported: numbers, operators, Enter to calculate, Escape to clear
How to use it
Enter the source data: Set DEG or RAD before entering any trigonometric expression. Build the expression with parentheses and explicit operators where ambiguity is possible.
Choose the relevant settings: Use powers, roots, log, ln, exp, factorial, constants, Ans, EE or mod as needed. Keep the expression visible above the result.
Review and verify the result: Review the value and history entry, then repeat with an independent form or known benchmark when the answer is important.
Key capabilities
- DEG and RAD angle modes.
- Trigonometric and inverse trigonometric functions.
- Powers, roots, log, ln, exp, factorial and absolute value.
- Constants, Ans, EE notation and modulo.
- Recent calculation history with the current interface retaining up to 20 entries.
Best use cases
- Evaluate a scientific expression without installing software.
- Check a trigonometry or logarithm exercise.
- Convert a hand calculation into a reproducible expression with history.
Limits and safety notes
- Floating-point arithmetic can introduce small rounding differences. log/ln require valid positive domains, square roots over reals reject negative inputs, and factorial is normally limited to non-negative integers within a practical range.
- The core transformation runs in the current browser component. Browser extensions, clipboard history, downloaded files and site-wide diagnostics remain separate exposure points, so never enter production secrets unless you have reviewed the complete environment.
Troubleshooting
Domain error
inspect inputs to log, ln, roots, inverse trig or factorial.
Unexpected precedence
add parentheses and avoid relying on ambiguous implicit multiplication.
Frequently asked questions
What is the difference between DEG and RAD?
DEG interprets angle inputs in degrees; RAD interprets them in radians. The same numeric input produces different trigonometric results.
Are calculator results exact?
Integers and some constants may be represented cleanly, but many operations use floating-point approximations. Display appropriate precision and avoid claiming exactness.
Why does factorial return an error?
In the usual real-number calculator scope, factorial requires a non-negative integer and may have a practical upper limit due to numeric size.
Is it safe and private?
The calculation runs in this browser component, but that alone is not a complete privacy guarantee. Use non-production data unless you have also reviewed extensions, clipboard history, downloads and site diagnostics.
Does it work on mobile?
The layout adapts to narrow screens. File selection, camera access, clipboard actions and downloads still depend on the permissions and capabilities of the mobile browser.
Related tools
Use the tool
Set the angle mode first, enter a complete expression and verify domain and precision before using the result.