Sine of Conjugate Angle

Theorem

 * $\sin \left({2 \pi - \theta}\right) = -\sin \theta$

where $\sin$ denotes sine.

That is, the sine of an angle is the negative of its conjugate.

Also see

 * Cosine of Conjugate Angle
 * Tangent of Conjugate Angle
 * Cotangent of Conjugate Angle
 * Secant of Conjugate Angle
 * Cosecant of Conjugate Angle