| Napier also found exponential expressions for trigonometric functions, and introduced the decimal notation for fractions. |
| The tables of logarithms which he published included logarithms of trigonometric functions for use by astronomers. |
| He summed series, and discovered addition theorems for trigonometric and hyperbolic functions using the differential equations they satisfy. |
| It handles general math functions, exponential and logarithmic functions, and trigonometric functions. |
| As Eisenstein shows, his method for constructing elliptic functions applies beautifully to the simpler case of trigonometric functions. |
| Brown's formulae involved some 1,650 trigonometric terms, many of them with variable coefficients. |
