versed sine

== English == === Etymology === From New Latin sinus versus (“flipped sine”); the sine function being sometimes called sinus rectus. === Noun === versed sine (plural versed sines) (trigonometry) The trigonometric function 1 − cos(x). ==== Usage notes ==== Once considered an important trigonometric function; now much less so, since the advent of calculators and computers. ==== Synonyms ==== (1 − cos): vers, versin, versine ==== Derived terms ==== coversed sine hacoversed sine haversed sine suversed ==== Translations ==== === Anagrams === Severnside