🔬 Scientific Calculator
Trigonometry, logarithms, exponents, and more
📊 Recent Calculations
Scientific Calculator Guide
Order of Operations
This calculator follows standard math order of operations: parentheses first, then exponents, then multiplication/division, then addition/subtraction (PEMDAS). Exponents are evaluated right-to-left, so 2^3^2 equals 2^(3^2) = 512, not (2^3)^2 = 64.
Degrees vs. Radians
| Mode | Full Circle | Use When |
|---|---|---|
| Degrees | 360° | Everyday geometry, most textbooks |
| Radians | 2π | Calculus, physics, higher math |
Toggle between the two using the DEG/RAD switch above the display — this affects sin, cos, tan, and their inverse functions.
Function Reference
| Button | Function |
|---|---|
| sin, cos, tan | Trigonometric functions |
| sin⁻¹, cos⁻¹, tan⁻¹ | Inverse trig (arcsin, arccos, arctan) |
| log | Base-10 logarithm |
| ln | Natural logarithm (base e) |
| √ | Square root |
| x², x^y | Square, or any power |
| n! | Factorial |
| π, e | Mathematical constants |
Frequently Asked Questions
Why is sin(30) not exactly 0.5?
Floating-point arithmetic in any computer or calculator can introduce tiny rounding errors (like 0.49999999999999994 instead of 0.5). This is normal and happens in all digital calculators, not just this one.
What does M+ and M− do?
M+ adds the currently displayed value to calculator memory; M− subtracts it. MR recalls the stored memory value into the display, and MC clears memory back to zero.
Why do I need to switch between DEG and RAD?
Trig functions interpret angle input differently depending on the unit. sin(30) in degree mode is 0.5, but sin(30) in radian mode is about -0.988, since 30 radians is a much larger angle. Always match the mode to what your problem specifies.
Can I use negative numbers and parentheses together?
Yes — expressions like -(2+3) or sqrt(4)*-2 are fully supported.