YLL討論網

(I thought this was a high school problem)
Alright here we go.
(1) It is easy to determine vertical asymptotic lines. Consider, then x = t0 is the vertical asymptotic line.
(2)I'll give you a hint on this one :
consider 0≦ t ≦π/2.
Now it can be shown that sin(t) ≦ t ≦ tan(t)  (think about why this is true; a geometric viewpoint may help)
Then work the inequality to fit your need and use squeeze theorem. :)

s(t)=t/sint 要尋找他的垂直近漸線

手中的詳解解釋的不是很好

另外想詢問 如果不用羅畢達定理 我該怎麼證明出他會趨近於1呢？？ 感謝各位大大