关于本计算器
Expression calculator with trigonometry, logs, powers and roots, DEG/RAD modes, live preview, history and full keyboard support.
科学计算器
含三角函数、对数、幂运算，支持角度/弧度。
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最近的计算记录
暂无已保存的计算记录。
常见问题
DEG or RAD?
Trig functions default to degrees; switch to RAD for calculus-style radians.
Why do I get an Error?
Division by zero, log of non-positive numbers or mismatched parentheses — check the expression.
Is the keyboard supported?
Yes — digits, operators, Enter (=), Backspace and Escape all work.