also: せかんと
noun
secant (trigonometric function)
Mathematical term; the reciprocal of cosine. Used in trigonometry.
正割は余弦の逆数です。
The secant is the reciprocal of the cosine.
三角関数の一つに正割があります。
One of the trigonometric functions is the secant.
Cosine; the secant is its reciprocal.
Sine; another fundamental trigonometric function.
Tangent; the ratio of sine to cosine.
From Chinese 正割 (zhènggē), literally 'upright cut', a calque of New Latin secans. The kanji 正 (upright) and 割 (cut) were chosen to represent the geometric concept.