This was just on the calculus board, but that was 4 hours ago with 3 views. Now, its urgent.

Hallo to everyone!

Describe the behavior of f(x) to the left and right of each vertical asymptote.

f(x) = tan x/ sin x

Are (0, 8 ) and (0,-8 ) at least starting points?

The answer is the book says:

a= (4k + 1) pi/2

b= (4k+ 4) pi/2

I have no clue what they are talking about.

The only helpful thing in the book is the definition of a vertical asymptote:

The line x= a is a vertical asymptote of the graph of a function y= f(x) if either

lim as x--> a+ f(x) = +/- infinity

lim as x--> a- f(x) = +/- infinity

I'm really lost.

Does AP Calculus questions go on this board?

Thanks.