Which of the following is the principal value branch of cosec-1 x?
(a) (-π/2, π/2) (b) [0, π] – {π/2} (c) [-π/2, π/2] (d) [-π/2, π/2] – {0}
(d) [-π/2, π/2] – {0}
As the principal branch of cosec-1 x is [-π/2, π/2] – {0}.
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