Scientific Tape
関数電卓 オンライン — 三角関数・対数・高度な科学計算機 | Cruse
三角関数（sin, cos, tan）、対数（log, ln）、指数、階乗、平方根などを高精度に計算できる無料のオンライン関数電卓。
ツールの使い方
Choose Angular Mode (DEG / RAD)
Switch between Degree (DEG) and Radian (RAD) mode in the top toolbar to ensure trigonometric functions evaluate accurately for your problem.
Enter Formulas & Functions
Click scientific functions (sin, cos, tan, log, ln, √, xʸ) and input numbers. Group terms with parentheses ( ) to preserve proper algebraic order of operations.
Evaluate, Inspect History & Copy
Press = or Enter to compute. Review past evaluations in the calculation tape, click any past answer to reuse it, or copy the final result.
技術仕様・標準規格
| Parameter / Standard | Specification |
|---|---|
| Evaluation Engine | Recursive algebraic parser with standard PEMDAS / BODMAS precedence |
| Trigonometric Functions | sin, cos, tan, asin (sin⁻¹), acos (cos⁻¹), atan (tan⁻¹) |
| Angular Units | Degrees (360° per revolution) & Radians (2π per revolution) |
| Powers & Roots | Square (x²), Power (xʸ), Square Root (√x), Nth Root (ʸ√x), Cube (x³) |
| Logarithms & Exponents | Natural log (ln), Base-10 log (log₁₀), Base-2 log (log₂), eˣ, 10ˣ |
| Mathematical Constants | π (3.141592653589793), e (2.718281828459045), φ (1.6180339887) |
| Combinatorics & Number Theory | Factorial (n!), Absolute value (|x|), Reciprocal (1/x), Modulo (%) |
| Client Privacy | 100% In-Browser. No equations, numbers, or inputs are ever sent to any server. |
よくある質問
When should I use DEG (Degrees) vs RAD (Radians)?
Use DEG when solving geometric problems, physics vectors, or angles measured between 0° and 360°. Use RAD in calculus, advanced trigonometry, physics oscillations, and when working with radians (where a full circle is 2π radians ≈ 6.283 rad).
How does the calculator handle operator precedence (PEMDAS/BODMAS)?
The scientific evaluation engine strictly adheres to standard mathematical hierarchy: Parentheses first, followed by Exponents/Roots, Multiplication & Division from left to right, and finally Addition & Subtraction. You can nest parentheses to any depth.
How do inverse trigonometric functions (sin⁻¹, cos⁻¹, tan⁻¹) work?
Click the "2nd" button on the keypad. The trigonometry keys will switch to asin, acos, and atan. Inputting a ratio will return the corresponding angle in your selected unit (degrees or radians).
How does the factorial (n!) function compute large numbers?
The factorial function accurately calculates integers up to 170! (approx. 7.25 × 10³⁰⁶), which is the standard IEEE-754 double precision floating-point maximum. For non-integers, Gamma function approximations can be referenced.