Trigonometric identities are powerful tools for simplifying complex equations in math and science. Three core ...

Understanding how to convert between degrees and radians is one of the most crucial skills for anyone studying trigonometry, ...

The volume contains values of trigonometric functions for every thousandth of a degree, to seven places. The first table give sines and cosines, the second tangents and cotangents. Information in the ...

While there were others, including Joost Bürgi (1552-1632), who contributed to the principles of logarithms, Napier is normally considered by most historians to be the primary inventor who presented ...