1·Notice the cosine function is...
注意这个余弦函数的。
2·Let us plot both the sine and the cosine curves.
假设我们同时绘制正弦和余弦曲线。
3·That is why the area gets shrunk by cosine alpha.
这就是为什么面积缩小了cosα倍。
4·A So I get zero equals A times the cosine of phi.
我得到0等于,乘以cosφ
5·But, we have the constraint, a equals b cosine theta.
但是我们有约束条件，a=b*cosθ
6·It is not very convenient to have a cosine left in here.
在这里留一个cos并不是很方便。
7·The title can be abbreviated to t, as we do for the cosine curve.
title可以缩写为t，正如我们对余弦曲线的设置。
8·Above, we plotted both the sine and cosine on the same graph.
上面，我们在同一图中绘制了正弦和余弦曲线。
9·Returns the hyperbolic cosine of a number! Is any real number !
计算数值的双曲余弦值。！任意实数。！
10·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。