Yushi H. answered • 02/11/18
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Stanford Masters student Specializing in Math/CS Subjects
If you recall, csc(x) = 1/sin(x). Since the range of sin(x) is -1 to 1, we can find the range of csc(x) = 1/sin(x) by taking 1/y for all y in [-1, 1]. This makes the range of csc(x) to be the union of (-infinity, -1] and [1, infinity).
