First, realize that it's of the indeterminate form ∞ - ∞ .
Express tan(x) and sec(x) in terms of sin(x) & cos(x) . Combine them into a single rational expression.
See what you then have.
Use L'Hôpital's rule if necessary.
Correct!
(1)Express the limit in the terms of sin(x) and cos(x).
(2)Use L Hopital's rule.
The correct answer is .
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