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Use the graph to complete the following identity: (Please see attached picture)?
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- mizooLv 72 years ago
undefined at pi/2: A or C
when x→pi/2- = +∞ =
lim x→pi/2-, cot (2x) = cot (pi-) = -∞
lim x→pi/2-, -cot (2x) = cot (pi-) = +∞
=> (C)
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