Degrees versus radians
sin(90) is 1 in degrees and a different number in radians. The mode is a setting, not an inference from the number you typed.
Your numbers
Scientific calculator
A bounded parser. It does not run JavaScript.Result
14How we got this
- Expression2 + 3 × 4
- Angle modedegrees
- Result14
What we assumed
- The evaluator is a bounded parser. It does not run JavaScript.
- sin, cos, and tan use the selected angle mode. log is base 10. ln is natural log.
- Factorial is limited to whole numbers through 18.
Technical details
Method scientific-v1.0.0Data Manual inputs / fixed rules
Discrepancy in the numbers? You can click Report incorrect result below or email hello@costanswer.com with the Method and Data lines.
Guide
A keypad that follows ordinary order of operations
Powers, roots, logs, factorials, and trig in degrees or radians, with π and e. The engine evaluates a normal arithmetic expression. It is not a computer-algebra system and not a graphing package.
Questions about this calculator
Does this use degrees or radians?
Whichever mode is selected. Check the control before you trust a trig result.
Is this a graphing or CAS calculator?
No. It evaluates ordinary expressions with powers, logs, and trig. It will not solve equations symbolically or plot graphs.
Terms used here
- Order of operations
- The usual precedence the keypad follows, including parentheses.
Practical tips
Factorials grow fast; large n will be rejected rather than overflowing silently if the engine bounds them.
Limits and caveats
Exact within ordinary floating-point evaluation. Not a proof assistant.
Results are for information. They are not legal, tax, medical, or financial advice. How the math is maintained · Report a wrong figure.
Engine notes
Rounding, versioning, and omissions that sit beside the guide rather than repeating it.
- What it understands. Numbers, + − × ÷, powers, parentheses, sqrt, log, ln, sin, cos, tan, abs, factorial, π, and e. Anything else is rejected instead of guessed at.
- Order of operations. 2 + 3 × 4 = 14. Parentheses change that: (2 + 3) × 4 = 20.
- Angles and limits. Trigonometry follows the radians or degrees mode you pick. Factorial stops at 18, and very long or deeply nested expressions are refused rather than run.
- How it is evaluated. Expressions are parsed by a purpose-built grammar. JavaScript’s eval and Function are never used, so nothing you type can execute as code.