# Secant

**noun**

1.

Geometry. an intersecting line, especially one intersecting a curve at two or more points.

2.

Trigonometry.

(in a right triangle) the ratio of the hypotenuse to the side adjacent to a given angle.

(originally) a line from the center of a circle through one extremity of an arc to the tangent from the other extremity.

the ratio of the length of this line to that of the radius of the circle; the reciprocal of the cosine of a given angle or arc.

Abbreviation: sec.

**adjective**

3.

cutting or intersecting, as one line or surface in relation to another.

**noun**

1.

(of an angle) a trigonometric function that in a right-angled triangle is the ratio of the length of the hypotenuse to that of the adjacent side; the reciprocal of cosine sec

2.

a line that intersects a curve

secant

(sē’kānt’)

A straight line or ray that intersects a curve, especially a circle, at two or more points.

The ratio of the length of the hypotenuse in a right triangle to the side adjacent to an acute angle. The secant is the inverse of the cosine.

The reciprocal of the abscissa of the endpoint of an arc of a unit circle centered at the origin of a Cartesian coordinate system, the arc being of length x and measured counterclockwise from the point (1, 0) if x is positive or clockwise if x is negative.

A function of a number x, equal to the secant of an angle whose measure in radians is equal to x.

Tagged: s

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