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Find the set of values of cosec–1(√3/2).
Let y = cosec–1 (√3/2)
We know that,
Domain of y = cosec–1 x is (– ∞, 1] U [1, ∞]
But √3/2 < 1
Therefore, it can not be a value of y.
Hence, Set of values of cosec–1(√3/2) is a null set.