正弦

The nonlinear wave shape degenerates to a sinusoidal wave.

非线性波形衰减成正弦波。

These two sinusoids are nearly out of phase.

这两个正弦波几乎是反相的。

Let´s now examine the simplest wave from where the profile is a sine or cosine curve.

现在让我们来考察最简单的波形，它的剖面图是正弦或余弦曲线。

The expression for g can be rewritten in terms of trigonometric sines and cosines.

关于g的表达式可以重写成三角函数的正弦和余弦形式。

We derive the addition formulas for sine and cosine from the arithmetic of complex numbers.

用复数算术推导了正弦，余弦的加法公式。