sine and cosine meaning in English

正弦和余弦

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。
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。
On a group of identity of sine and cosine function
余弦函数的一组恒等式
A high precision direct integration method to solve sine and cosine matrix functions
正余弦矩阵函数的精细积分算法
Design of the sine and cosine precision reference of high precision excitation power supply with closed loop control
高精度闭环激磁电源正余弦精密基准的设计

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