Your English grammar needs help too! Questions begin with a capital letter and end with a question mark. Also the word you mean is "vertical". I don't think you would like it if I wrote my answer in run-on sentences so that the answer wasn't clear!
tan x is unbounded in both directions whenever cos x=0, i.e. at odd multiples of pi/2. Therefore, whenever x=(2k+1)*pi/2, there will be a vertical asymptote. On one side tan x will go to -infinity and on the other side it wll go to +infinity.
Amy C.
Also, there are some people who may not know English very well so I wouldn't be judging. I'm not trying to be rude you just don't know people's background. Have a nice day.
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03/22/21
Amy C.
I was in a hurry, but thank you anyway.03/22/21