| 1. | The bar directions are conveniently specified by direction cosines .
杆的方向通常用方向余弦来表示。 |
| 2. | The cosine rather than the sine is customarily used in this case .
在这种情况下，习惯上用余弦函数而不是正弦函数。 |
| 3. | 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。 |
| 4. | 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。 |
| 5. | Let's now examine the simplest wave form 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。 |
| 6. | The nine elements of the matrix are products of cosines of angles between the direction of a streamline at a point and the coordinate axis .
这矩阵的9个元素系一点的流线方向和座标轴之间夹角余弦的乘积。 |
| 7. | Speech enhancement based on discrete cosine transform
基于离散余弦变换的语音增强 |
| 8. | Finite point matrix method based on cosine spline
基于余弦样条函数的有限点阵法 |
| 9. | Returns the hyperbolic cosine of the specified angle
返回指定角度的双曲余弦值。 |
| 10. | Value containing the cosine of the specified angle
值，此值包含指定角度的余弦。 |
