Hello there,
You have mixed up all things in a single line without separation . The question is difficult to read . We are not getting where the limit is tending and also from where the question starts .So please post a new question with all necessary details . Only then we can help you.
Hope this helps
Question : Using trigonometric formulas, find the value of $(\frac{\sin (x-y)}{\sin (x+y)})(\frac{\tan x+\tan y}{\tan x-\tan y})$
Question : What will be the value of $\cos x \operatorname{cosec} x - \sin x \sec x$?
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