One of the mysteries of the English language finally explained.
The ratio of the hypotenuse (in a right-angled triangle) to the side opposite an acute angle; the reciprocal of sine.
- ‘‘Negative cosecant squared x,’ I murmured, feeling as light-headed and tingle-infested as I had when I'd received a perfect score.’
- ‘The variance of D is computed from the variance of the misclosure W scaled with the separation of the planes of position dv and the cosecant of the angle of maximum inclination of the slope dd.’
- ‘The secant and cosecant were not used by the early astronomers or surveyors.’
- ‘No I'm not, that's quite the negative cosecant.’
- ‘The other angle, B has its tanglent equal to its cosecant (the reciprocal of the sine).’
Early 18th century: from modern Latin cosecant-, from co- ‘mutually’ + Latin secant- ‘cutting’ (from the verb secare). Compare with secant.
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