Trig identity check
sin(30) + cos(60)1
Scientific Calculator
Use this free scientific calculator for trigonometry, logarithms, square roots, cube roots, powers, constants, DEG/RAD mode, expression history, and quick result copying.
Keyboard support DEG / RAD mode Expression history Copy results
DEG mode
How to use the Scientific Calculator
- Type an expression or use the scientific keypad.
- Choose DEG or RAD before using trigonometry.
- Use functions such as sin, cos, tan, log, ln, sqrt, cbrt, powers, pi, and e.
- Press equals or Enter, then copy the result or reuse an expression from history.
What people use it for
Solve trigonometry problems with DEG or RAD angle mode.
Calculate logarithms, natural logs, square roots, cube roots, and powers.
Check science, math, engineering, and study expressions in one line.
Reuse recent expressions from the history panel while comparing answers.
Quick examples
Common logarithm
log(1000)3
Roots together
sqrt(25) + cbrt(8)7
Need the guide or a nearby tool?
Need a slower walkthrough, a related calculator, or the full library? These links keep you close to the task you started.
- How to use the Scientific Calculator See slower examples, input meanings, formula notes, result limits, and mistakes to avoid.
- Calculators Browse related calculators and utilities in the same category.
- Calculator and utility guides Find more guides that use real tool inputs and example numbers.
- All free tools Search every live tool, converter, calculator, AI helper, and browser utility.
Frequently asked questions
Quick answers about angle mode, supported functions, typing expressions, and privacy.
What is the difference between DEG and RAD?
DEG uses degrees for trigonometry, so sin(30) means 30 degrees. RAD uses radians, which is common in advanced math and many science classes.
Which functions are supported?
The calculator supports sin, cos, tan, inverse trig functions, log, ln, sqrt, cbrt, abs, powers, parentheses, pi, e, and standard arithmetic.
What do the main Scientific Calculator inputs mean?
The main inputs are the numbers, operation, mode, or known values the calculator needs. Keep units consistent, enter percentages the way the page label shows, and use the examples as a quick check before trusting the answer.
How should I read the Scientific Calculator answer?
Read the headline answer, then check the supporting lines and examples to understand how the calculator got there. If one input changes, rerun the tool and compare the new answer instead of guessing.
Can I type expressions directly?
Yes. You can click the keypad or type expressions such as sin(45)+log(100). Press Enter or the equals button to calculate.
Does the history leave my browser?
No. Recent scientific calculations stay in the page session only and are not sent to a server.
What is this Scientific Calculator best for?
Use it when you need trig functions, logs, roots, powers, constants, parentheses, or DEG/RAD angle mode. For plain totals and quick percentages, the Basic Calculator is simpler.
What should I check before trusting a scientific result?
Check parentheses, angle mode, negative signs, and whether your class or formula expects degrees or radians. A correct expression in the wrong mode can still give the wrong answer.