“We prefer sines and cosines... but we have to really get outside ... Fundamentally a trigonometric table must describe three ratios of a right triangle. So we throw away sin and cos and instead ...

Here is the solution that the homework was looking for: This uses the trigonometry sum of angles formula and breaks the cosine into a function of sines and ... look it up in a table.

THE main content of this volume consists of a six-figure table of sines, tangents, cotangents and cosines over the range 0°-45°. Each page represents a range of 10 minutes, the intervals ...

The graphs of sine and cosine are included as well. Worth mentioning, though beyond the scope of this article, is that these functions relate to each other through a great variety of intricate ...

From the seventeenth century, scales of sines and tangents were found on ... Those carrying out more precise calculations consulted printed tables of trigonometric functions. By the twentieth century, ...

Although the proof is an impressive bit of mathematics, other mathematicians have employed similar approaches before, using sine and cosine to independently prove the Pythagorean Theorem without ...

These functions, such as the sine and cosine, are defined using right triangles. Imagine a right triangle with one side that lies flat against a table and another that shoots straight up from ...

Now, a new article not only proves that theorem—which relies on the Law of Sines—but puts forth four more trigonometric proofs, as well as five additional proofs outside of trigonometry.