免费正弦计算器
计算角度的正弦值，支持度和弧度输入。
deg
Sine Val
0.50000000
Cosine Val0.86602540
Tangent Val0.57735027
弧度0.523599
公式
## Sine Function ### Definition In a right triangle, **sin(angle) = opposite / hypotenuse**. On the unit circle, sin(angle) is the y-coordinate of the point at that angle. ### Key Values | Angle | sin | |-------|-----| | 0° | 0 | | 30° | 0.5 | | 45° | √2/2 ≈ 0.7071 | | 60° | √3/2 ≈ 0.8660 | | 90° | 1 |
计算示例
Calculate sin(30°).
- 0130° in radians = 30 × pi/180 = pi/6 ≈ 0.5236
- 02sin(30°) = 0.5
- 03cos(30°) = √3/2 ≈ 0.8660
- 04tan(30°) = 1/√3 ≈ 0.5774
常见问题
What is the sine function?
Sine is a trigonometric function that gives the ratio of the opposite side to the hypotenuse in a right triangle, or the y-coordinate on the unit circle.
What is the range of sine?
The sine function outputs values between -1 and 1. sin(90°) = 1 and sin(270°) = -1.
What is the period of sine?
Sine has a period of 360° (2pi radians). The function repeats every full rotation.
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