$\"\"$

The functions are $\"\"$ and $\"\"$ .

Consider $\"\"$ .

Multiply the numerator and denominetor by $\"begin$ .

$\"\"$

Apply formula : $\"begin$ .

$\"g$ .

Pythagorean identity : $\"\"$ .

$\"g$

Reciprocal identity : $\"\"$ .

Trigonometric function : $\"\"$ .

$\"\"$

$\"\"$ .

$\"\"$

The functions $\"\"$ and $\"\"$ are identically equal.