Trigonometry the reciprocal of the sine; specif.
- the ratio of the hypotenuse to the opposite side of a given acute angle in a right triangle
- an equivalent, positive or negative ratio for certain related angles (Ex.: the cosecant of 57° or 123° is 1.1923, of 237° or 303° is ?1.1923) or real numbers representing radians (Ex.: the cosecant of .9948 radians (57°) is 1.1923)
Origin of cosecantFrench cosécante, for Modern Latin co. secans, short for complementi secans, literally , secant of the complement
- The reciprocal of the sine of an angle in a right triangle.
- The secant of the complement of a directed angle or arc.
csc &thgr; = c a