Secant is a term in mathematics derived from the Latin secare ("to cut"). It may refer to:
a secant line, in geometrythe secant variety, in algebraic geometrysecant (trigonometry) (Latin: secans), the multiplicative inverse (or reciprocal) trigonometric function of the cosinethe secant method, a root-finding algorithm in numerical analysis, based on secant lines to graphs of functionsa secant ogive in nose cone design reference
