Evaluate the following limits: `lim_(xto(pi)/(4))((cosec^(2)x-2))/((cotx-1))`

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Evaluate the following limits: `lim_(xto(pi)/(4))((cosec^(2)x-2))/((cotx-1))`
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Evaluate the following limits: `lim_(xto(pi)/(4))((cosec^(2)x-2))/((cotx-1))`

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