Scientific Calculator Online: Trig, Logs, Sin Cos Tan | Free
Free online scientific calculator with trigonometry (sin, cos, tan), logarithms, powers, π and e. Deg/Rad toggle. Unit Circle visualizer. Memory and history. No sign-up.
What Is a Scientific Calculator? Free Online Trig & Log Tool
A scientific calculator handles advanced math beyond basic arithmetic: trigonometry (sin, cos, tan and their inverses sin⁻¹, cos⁻¹, tan⁻¹), logarithms (log base 10, ln base e), powers (x^y, x², x³, e^x, 10^x), roots (√, ³√x), constants π and e, factorial (n!), modulo (%), and reciprocal (1/x). This free scientific calculator online includes a Deg/Rad toggle for angle mode—essential when using sin cos tan on a calculator—and a Unit Circle visualizer that appears when you compute trig values. Results format in scientific notation when needed. Memory (M+, M-, MR) and a history drawer store your last 10 calculations. All computation runs locally in your browser; no data is sent to servers.
Why Use Our Free Scientific Calculator?
Trust, Precision, and Privacy
- Trusted for learning:Precise formulas, local computation, and educational content built for students and professionals
- Deg/Rad accuracy:Correct angle handling for degrees vs radians—critical for physics, engineering, and calculus
- Unit Circle visualizer:See where angles land on the unit circle to verify sin, cos, tan values
- High precision:Scientific notation for very large or small results; no arbitrary limits on expression length
Our scientific calculator uses standard JavaScript Math functions and double-precision arithmetic—the same foundations used in professional tools. Trusted by students and educators for homework, exams, and real-world applications. Every calculation runs locally: no tracking, no accounts, no data collection. You get a free scientific calculator with full trig, logs, and powers without compromises.
How to Use Sin Cos Tan on a Scientific Calculator
Set the Deg/Rad toggle (see FAQ for when to use each). Type
or
—or use shortcuts s, c, t—and press = to compute. For inverse trig, use sin⁻¹, cos⁻¹, tan⁻¹ when you have a ratio and need the angle. The Unit Circle visualizer shows the angle and its sine/cosine coordinates after each trig calculation. All processing runs in your browser—no data sent to servers.
FAQ
? How do I use degrees vs radians on a scientific calculator?
Use the Deg / Rad toggle above the display. In Deg mode, sin, cos, and tan expect angles in degrees (e.g.
). In Rad mode, angles are in radians (e.g.
). Inverse functions (sin⁻¹, cos⁻¹, tan⁻¹) return degrees in Deg mode and radians in Rad mode. Use Deg for most homework and real-world problems; use Rad for calculus and physics.
? What keyboard shortcuts does the scientific calculator have?
Type s for sin(, c for cos(, t for tan(, l for log(, n for ln(, p for π. Enter or = to calculate, Backspace to delete, Esc to clear. Full keyboard support makes it faster than clicking buttons for heavy use.
? How does the Unit Circle visualizer work?
When you calculate a trigonometric expression (e.g. sin(30) or cos(45)), the calculator displays a Unit Circle with the angle highlighted. The radius from the origin to the point on the circle helps you visualize sine (y) and cosine (x) values. This is useful when learning how to use sin cos tan on a calculator.
? Does the calculator support scientific notation?
Yes. Results with more than 10 digits, or very large (≥10¹⁰) or very small (<10⁻⁶) values, are automatically formatted in scientific notation for readability.
? How do I use memory (M+, M-, MR) on the scientific calculator?
M+ adds the current result to memory, M- subtracts it, and MR recalls the stored value into your expression. Use memory when you need to reuse an intermediate result across several calculations. The M indicator appears when memory is non-zero.