$\"\"$

The limit is $\"\\lim_{x\\rightarrow$ .

Quotient trigonometric identity: $\"\\tan$ .

$\"\\lim_{x\\rightarrow$

$\"=\\lim_{x\\rightarrow$

$\"\\\\=\\lim_{x\\rightarrow$

$\"\"$ $\"\\\\\\\\=\\frac{-1}$

$\"\\lim_{x\\rightarrow$ .

$\"\"$

$\"\\lim_{x\\rightarrow$ .