- If the tangent of an angle is a/b then the cotangent of that angle is b/a.
- Since we want the cotangent, just take the reciprocal to solve.
- I can't tell the difference between radians, tangents, cotangents, secants, etc.
- The first tabulates logarithms of the sine, cosine, tangent and cotangent functions at 1 intervals and shows how to solve triangles using logarithmic functions.
- The tangent and cotangent came via a different route from the chord approach of the sine.