Evaluate : lim x → π/4 (cosec²x - 2)/(cotx - 1)

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lim x → π/4 (cosec²x - 2)/(cotx - 1)
lim x tends to pi/4 (cosec2x-2)/cotx-1
Evaluate the limit: limx → π/4 (cosec^2 x - 2)/(cot x - 1)
Lim x tend to pi/4 (cosec x - 2)/(cot x - 1)
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