Question

Limit,

http://screencast.com/t/zy4blw8v2mCO

Answer 1

this is really written very poorly
i assume the denominator is actually
\[\cot\left(\frac{\pi x}{2}\right)\]

Answer 2

hmm I am confused about this as well. You think that's the case ?

Answer 3

then taking the derivative with the chain rule, you get
\[-\csc^2\left(\frac{\pi x}{2}\right)\times \left(\frac{\pi}{2}\right)\]

Answer 4

That's the image of the original exersise text: http://screencast.com/t/noDV3YXObiq8

Answer 5

that is the only thing it can mean that makes sense
too bad the person who wrote this cannot write math

Answer 6

i totally believe you, it is a failure on the part of the person who wrote the problem

Answer 7

here is another one to go in my "bad math" pile

Answer 8

Thanks man, pheu

Answer 9

yw