isolated singularities

hello;
I have simple question,
Can you determine whether the function f(z)=sinz/(e(iz) +1 ) has removable or simple poles at z=Pi+2Pik wher k is an integer

I am a little bet confusing,

Thank you in advance

Quote:

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Originally Posted by fuzzy topology

hello;
I have simple question,
Can you determine whether the function f(z)=sinz/(e(iz) +1 ) has removable or simple poles at z=Pi+2Pik wher k is an integer

I am a little bet confusing,

Thank you in advance

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What is confusing? What makes a a singularity removable, opposed to being a simple pole?