$\"\"$

The equation is $\"\"$ .

$\"\"$ (Write left side of equation)

$\"\"$ (Apply reciprocal identity: $\"\"$ )

$\"\"$ (Apply double angle formula: $\"\"$ )

$\"\"$ (Divide numerator and denominator by $\"\"$ )

$\"\"$ (Simplify)

$\"\"$ (Apply reciprocal identity: $\"\"$ )

The above expression is right side of the equation.