| Not surprisingly, he also discovered the infinite power series for the cosine and the tangent. |
| The sine and the cosine I shall have occasion to employ in the latter part of my lecture. |
| The optical path difference is directly proportional to the cosine of the angle of refraction through the coating. |
| We show that the effective reflectance of the bottom is proportional to the average cosine of the bottom slope. |
| Nevertheless, I bear no grudge against the sine and the cosine, which I continue to hold in high esteem. |
| In fact, it corresponds to the graph of a function called the hyperbolic cosine. |
