Упростите: sin пи/18*cos пи/9+sin пи/9* cos пи/18 / sin пи/36* cos 35пи/18 + sin 35пи/18* cos пи/36

Упростите выражение: \( \frac{\sin \frac{\pi}{18} \cos \frac{\pi}{9} + \sin \frac{\pi}{9} \cos \frac{\pi}{18}}{\sin \frac{\pi}{36} \cos \frac{35\pi}{18} + \sin 35\frac{\pi}{18} \cos \frac{\pi}{36}} \)