Wiskunde Multiple Choice Vraag uit Gricha's Wiskundige Vragenbank

sin 30° cos 30° ——— — ———— sin 10° cos 10° is gelijk aan	A. 1
B. 2
C. 3
D. 4
E. 0

$\\\frac{\sin 30^{\circ}}{\sin 10^{\circ}}-\frac{cos 30^{\circ}}{\cos 10^{\circ}}=\frac{\sin 30^{\circ}\cdot cos 10^{\circ}-\cos 30^{\circ}\cdot\sin 10^{\circ}}{\sin 10^{\circ}\cdot cos 10^{\circ}}\\=\frac{\sin(30^{\circ}-10^{\circ})}{\frac{1}{2}\sin 20^{\circ}}=\frac{\sin 20^{\circ}}{\frac{1}{2}sin 20^{\circ}}=\cdots$