co·tan·gent
| \ (ˌ)kō-ˈtan-jənt
, ˈkō-ˌtan- \
, ˈkō-ˌtan- \
Definition of cotangent
1
: a trigonometric function that for an acute angle is the ratio between the leg adjacent to the angle when it is considered part of a right triangle and the leg opposite
2
: a trigonometric function cot θ that is equal to the cosine divided by the sine for all real numbers θ for which the sine is not equal to zero and is exactly equal to the cotangent of an angle of measure θ in radians
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“Cotangent.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/cotangent. Accessed 18 May. 2021.
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Time Traveler for cotangent
The first known use of cotangent was in 1635
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