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⁻¹y = 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⁻¹x = 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)