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Find the set of values of "c o s e c"...

Find the set of values of `"c o s e c"^(-1)((sqrt(3))/2)`

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Let `y = cosec^(-1)(sqrt3/2)`
We know that, Domain of `y = cosec^(–1) x` is `(– oo, 1] cup [1, oo]` But `sqrt3/2 < 1`
Therefore, it can not be a value of `y`.
Hence, set of values of `cosec^(–1)(sqrt3/2)` is a null set.
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