Use ans for the last result, m for memory — they work inside expressions.
About Scientific Calculator
Trigonometry, logarithms, powers, roots and constants with a degree/radian switch — a scientific calculator that runs entirely in your browser.
What it does
The standard scientific set: sin, cos and tan with their inverses, natural and base-10 logarithms, exponentials, powers and roots, factorials, and the constants π and e. A degree/radian toggle governs every trigonometric function, and the current mode is always visible so you are never one silent setting away from a wrong answer.
When you'd use it
Coursework, engineering checks, and the moment a spreadsheet formula gives a number that looks wrong and you want to evaluate one term by hand. For plain arithmetic the simpler Calculator is faster to use.
Common questions
- Are trig functions in degrees or radians?
- Whichever the mode says — there is an explicit DEG/RAD toggle, and it applies to every trigonometric function including the inverses.
- Why does sin(π) not return exactly zero?
- Because binary floating point cannot represent π exactly. You get a value around 1e-16, which is the correct answer for the number actually supplied. Every calculator using IEEE 754 doubles behaves this way.
- Is there a calculation history?
- The expression you are building stays visible so you can check it before evaluating.