+Secant is a fundamental [Trigonometric Function](/wiki/trigonometric_function), defined as the reciprocal of the [Cosine](/wiki/cosine) of an angle. In a right triangle, it represents the ratio of the hypotenuse to the adjacent side.
+## See also
+- [Sine](/wiki/sine)
+- [Tangent](/wiki/tangent)
+- [Unit Circle](/wiki/unit_circle)
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