科學計算機
DEG
0
常見問題
- How do I switch between degrees and radians?
- Press the DEG/RAD key at the top-left of the keypad. The current mode is shown on the display. In DEG mode, sin(90) = 1; in RAD mode, sin(π/2) = 1.
- How do I calculate powers and roots?
- Use x² for squares, ^ for any power (2^10 = 1024), √ for square roots, and ⁿ√ for other roots — it types root( and takes two inputs: root(3, 27) is the cube root of 27, which equals 3.
- What is the ANS key?
- ANS inserts the result of your previous calculation, so you can chain steps: after 6 × 7 = 42, pressing ANS + 1 = gives 43.
- How do I use the inverse trig functions?
- sin⁻¹, cos⁻¹ and tan⁻¹ compute the angle whose sine, cosine or tangent you enter. The answer comes back in the current angle mode — sin⁻¹(1) is 90 in DEG mode and π/2 ≈ 1.5708 in RAD mode.
- What is the difference between log and ln?
- log is the base-10 logarithm (log(1000) = 3) and ln is the natural logarithm, base e ≈ 2.71828 (ln(e) = 1). Both are defined for positive numbers only.
- Can I type calculations with my keyboard?
- Yes — digits, the + - * / ^ % ( ) keys, Enter for equals, Escape to clear, and Backspace to delete all work exactly like the on-screen keys.
- How large a factorial can it compute?
- Up to 170! — beyond that the result exceeds what standard floating-point numbers can represent, and the calculator reports an error instead of showing an inaccurate value.
這是什麼科學計算機？
一款免費的線上科學計算機，具備經典卡西歐式計算機的功能：可切換角度/弧度的三角函數、常用對數與自然對數、冪與根、階乘、常數 π 與 e、括號、百分比、記憶功能，以及叫出上一個結果的 ANS 鍵。
功能說明
- 三角函數 —— sin、cos、tan 及其反函數。注意 DEG/RAD 指示：角度模式下 sin(90) = 1。
- 冪與根 —— x² 平方，^ 任意次冪（2^10 = 1024），√ 平方根，ⁿ√ 輸入 root(n, x)：root(3, 27) = 3。
- 對數 —— log 為常用對數（底為 10），ln 為自然對數（底為 e）。
- 階乘 —— 5! = 120，最大支援 170!。
鍵盤操作
數字、+ - * / ^ % !、Enter 等號、Escape 清除、Backspace 刪除。
使用限制
- 約 15 位有效數字；超大結果以科學記數法顯示。
- 未定義的運算會顯示清晰的錯誤提示。