co·tan·gent 
(kō-tănjənt, kōtăn′-)
(kō-tănjənt, kōtăn′-)n. Abbr. cot
1. The reciprocal of the tangent of an angle in a right triangle.
2. The tangent of the complement of a directed angle or arc.
co′tan·gential (-jĕnshəl) adj.
cotangentcot θ = b/a
- hydrotherapy
- hydrothermal
- hydrothermally
- hydrothermal vent
- hydrothorax
- hydrotropic
- hydrotropism
- hydrous
- hydroxide
- hydroxide ion
- hydroxy
- hydroxyapatite
- hydroxybutyric acid
- hydroxychloroquine
- hydroxyl
- hydroxylamine
- hydroxylate
- hydroxylation
- hydroxylic
- hydroxyl ion
- hydroxyurea
- hydroxyzine
- hydrozoan
- Hydrus
- hyena