$\"\"$

The trigonometric identity is $\"italic$ .

Start the left side $\"italic$

Apply half-angle formula: $\"italic$ .

$\"italic$

$\"equal$ (Apply standard division form: $\"fraction$ )

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

\"equal

(Apply quotient identity:

\"italic

) $\"\"$ \

The trigonometric identity is $\"italic$ is "true".