1. English astronomer and mathematician who invented a surveying chain, quadrant, and scale and introduced the trigonometric terms cosine and cotangent. 
   冈特，埃德蒙1581－1626英国天文学家和数学家，发明了测链，象限仪和标尺，并引进了两个三角学术语，余弦和余切
2. MPEG2 also uses the discrete cosine transform, which takes images and finds their frequency and then compresses any repetitive frequencies. 
   mpegz也使用离散的余弦转换，这种转换可获取图像，发现它们的频率，然后压缩任何的重复频率。
3. The product of the effective values of the voltage and current with the cosine of the phase angle between current and voltage in an alternating-current circuit. 
   伏特量交流电路中电压与电流的有效值以及电流与电压之间相位角的余弦之乘积
4. A subroutine that returns the value of a single variable, and that usually has a single exit, for example, subroutines that compute mathematical functions, such as sine, cosine, logarithm, or that compute the maximum of a set of numbers. 
   一种子例行程序，它返回一个单独变量值，通常只有一个出口。例如计算数学函数的子例程，像正弦、余弦、对数等，又如求一组数的最大值的子例程。

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