名词
中文翻译：余弦波
同义词：
['sine wave', 'rectangular wave', 'harmonic wave']
例句：
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1. Thecosine wave is a type of wave that oscillates back and forth.
余弦波是一种振荡来回摆动的波形。
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2. In the study of electromagnetic waves, the cosine wave is used to model the propagation of light.
在电磁波研究中，余弦波被用来模拟光的传播。
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3. The cosine wave has a period of 2π radians, which means it repeats every 2π radians.
余弦波的周期为2π弧度，意味着它每2π弧度重复一次。