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---
title: Amplitude and Period of Sinusoidal Functions from Equation
localeTitle: 方程的正弦函数的幅度和周期
---
## 方程的正弦函数的幅度和周期
正弦函数的**通用方程**是:
![通用正弦方程](https://github.com/viso-gio/HostedImages/blob/master/GenericSinusoid.png?raw=true)
其中_A_代表振荡的**幅度** _f_代表**频率** 。 _Phi_是**相位** 与正弦曲线沿_x_轴移动的量相关联。 _Omega_是**角频率** ,表示振荡速率为每秒弧度。
振荡**周期** _T_由下式给出:
![](https://github.com/viso-gio/HostedImages/blob/master/PeriodFormula.png?raw=true)
常见的**替代形式**的正弦曲线是:
![替代正弦方程](https://github.com/viso-gio/HostedImages/blob/master/AlternativeSinusoid.png?raw=true)
在这种情况下, **幅度**计算如下:
![替代振幅](https://github.com/viso-gio/HostedImages/blob/master/AlternativeAmplitude.png?raw=true)
#### 更多信息:
欲了解更多信息,请访问:
* [MathIsFun](https://www.mathsisfun.com/algebra/amplitude-period-frequency-phase-shift.html)
* [维基百科:正弦波](https://en.wikipedia.org/wiki/Sine_wave)