An arccosecant is an angle whose cosecant is a particular value. The arccosecant is a trigonometric function. The arccosecant is the functional inverse of the cosecant. If hypotenuse/opposite = csc(θ) then csc-1(hypotenuse/opposite) = θ. Arccosecant is written arccsc or csc-1.
Definition: y = csc-1 x if and only if x = csc y.
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