Sin-1
# Sin-1

Sin-1, SIN-1, sin-1, or $sin^{−1}$ may refer to:

* SIN-1, Linsidomine (3-morpholinosydnonimine), a drug acting as a vasodilator
* sin x−1 = sin(x)−1 = −(1−sin(x)) = −cvs(x) or negative coversine of x, the additive inverse (or negation) of an old trigonometric function
* $sin^{−1}y$ = $sin^{−1}(y),$ sometimes interpreted as arcsin(y) or arcsine of y, the compositional inverse of the trigonometric function sine (see below for ambiguity)
* $sin^{−1}x$ = $sin^{−1}(x),$ sometimes interpreted as $(sin(x))^{−1}$ = 1/sin(x) = csc(x) or cosecant of x, the multiplicative inverse (or reciprocal) of the trigonometric function sine (see above for ambiguity)
* sin $x^{−1},$ sometimes interpreted as $sin(x^{−1})$ = sin(1/x), the sine of the multiplicative inverse (or reciprocal) of x (see below for ambiguity)
* sin $x^{−1},$ sometimes interpreted as $(sin(x))^{−1}$ = 1/sin(x) = csc(x) or cosecant of x, the multiplicative inverse (or reciprocal) of the trigonometric function sine (see above for ambiguity)
