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Sequences Review: Trigonometric Cofunctions

TOPO-BD32MQ

Which of the following sequences converge(s)? Select ALL that apply.

A

$a_n=\csc n$

B

$a_n=\text{csch } n$

C

$a_n=\cos n$

D

$a_n=\cosh n$

E

$a_n=\coth n$