- 正弦波 zhèngxiánbō sine waveA mathematical curve that describes a smooth periodic oscillation, commonly used in physics and signal processing.
- 双曲正弦 shuāngqūzhèngxián hyperbolic sinehyperbolic sine or sinh (math.)
- 双曲线正弦 shuāngqūxiànzhèngxián hyperbolic sinehyperbolic sine or sinh (math.)
- 正弦定理 zhèngxiándìnglǐ law of sines
- 正弦形 zhèngxiánxíng sinusoidalsinusoidal (shaped like a sine wave)
