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Lt(xrarr(pi)/(2))(a^cotx -a^cosx)/(cotx-...

`Lt_(xrarr(pi)/(2))(a^cotx -a^cosx)/(cotx-cosx),agt0`

A

`=log_(e)""(pi)/(2)`

B

`=log_(e)2`

C

`=log_(e)a`

D

`=a`

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