Secant of Angle plus Full Angle

Theorem

 * $\sec \left({x + 2 \pi}\right) = \sec x$

Also see

 * Sine of Angle plus Full Angle
 * Cosine of Angle plus Full Angle
 * Tangent of Angle plus Full Angle
 * Cotangent of Angle plus Full Angle
 * Cosecant of Angle plus Full Angle