About 三角函数计算器
计算sin、cos、tan及其反函数
Use this free online 数学工具 tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
计算sin、cos、tan及其反函数
sin(45°)
0.707107
cos(45°)
0.707107
tan(45°)
1
csc (1/sin)
1.414214
sec (1/cos)
1.414214
cot (1/tan)
1
Angle Conversions
Inverse Trigonometric Functions
arcsin
30.00°
arccos
60.00°
arctan
26.57°
sinh
0.868671
cosh
1.324609
tanh
0.655794
| Degrees | Radians | sin | cos | tan |
|---|---|---|---|---|
| 0° | 0 | 0 | 1 | 0 |
| 30° | π/6 | 1/2 | √3/2 | √3/3 |
| 45° | π/4 | √2/2 | √2/2 | 1 |
| 60° | π/3 | √3/2 | 1/2 | √3 |
| 90° | π/2 | 1 | 0 | ∞ |
| 180° | π | 0 | -1 | 0 |
| 270° | 3π/2 | -1 | 0 | ∞ |
| 360° | 2π | 0 | 1 | 0 |
sin²(θ) + cos²(θ) = 1
tan(θ) = sin(θ) / cos(θ)
1 + tan²(θ) = sec²(θ)
1 + cot²(θ) = csc²(θ)
sin(2θ) = 2sin(θ)cos(θ)
cos(2θ) = cos²(θ) - sin²(θ)
计算sin、cos、tan及其反函数
Use this free online 数学工具 tool to work faster without installing extra software. The interface is built for quick input, clear output, and straightforward results on desktop and mobile devices.
This tool runs in your browser whenever possible, which keeps your inputs private and reduces unnecessary round-trips to the server.