exsecant
Sign in to saveAlso known as exsec, exs, exterior secant, external secant, outer secant, outward secant
thumb|upright=1.25|The exsecant and versine functions substitute for the expressions and which appear frequently in certain applications. thumb|upright=1.25|The names exsecant, versine, chord, etc. can also be applied to line segments related to a circular arc. The length of each segment is the radius times the corresponding trigonometric function of the angle.
~9 min read
Article
9 sectionsContents
- Etymology
- History and applications
- Catastrophic cancellation for small angles
- Mathematical identities
- {{anchor|arcexsec}}Inverse function
- Calculus
- Double angle identity
- See also
- Notes and references
thumb|upright=1.25|The exsecant and versine functions substitute for the expressions and which appear frequently in certain applications. thumb|upright=1.25|The names exsecant, versine, chord, etc. can also be applied to line segments related to a circular arc. The length of each segment is the radius times the corresponding trigonometric function of the angle.
The external secant function (abbreviated exsecant, symbolized exsec) is a trigonometric function defined in terms of the secant function: