Csc-1

Csc-1, CSC-1, csc-1, or csc⁻¹ may refer to:

• csc x−1 = csc(x)−1 = excsc(x) or excosecant of x, an old trigonometric function
• csc⁻¹y = csc⁻¹(y), sometimes interpreted as arccsc(y) or arccosecant of y, the compositional inverse of the trigonometric function cosecant (see below for ambiguity)
• csc⁻¹x = csc⁻¹(x), sometimes interpreted as (csc(x))⁻¹ = 1/csc(x) = sin(x) or sine of x, the multiplicative inverse (or reciprocal) of the trigonometric function cosecant (see above for ambiguity)
• csc x⁻¹, sometimes interpreted as csc(x⁻¹) = csc(1/x), the cosecant of the multiplicative inverse (or reciprocal) of x (see below for ambiguity)
• csc x⁻¹, sometimes interpreted as (csc(x))⁻¹ = 1/csc(x) = sin(x) or sine of x, the multiplicative inverse (or reciprocal) of the trigonometric function cosecant (see above for ambiguity)