| The tangent and cotangent came via a different route from the chord approach of the sine. |
|
| Since we want the cotangent, just take the reciprocal to solve. |
|
| The first tabulates logarithms of the sine, cosine, tangent and cotangent functions at 1 intervals and shows how to solve triangles using logarithmic functions. |
|
| This is the inverse of the cotangent function. |
|
| It will output the corresponding angle of a given cotangent value. |
|
| In 1620 Edmund Gunter, the English mathematician who coined the terms cosine and cotangent, built a device for performing navigational calculations: the Gunter scale, or, as navigators simply called it, the gunter. |
|
| The scales provide the tangent or cotangent of the meridian altitude. |
|
