Evaluate the following:
$$\frac{{\cos 2\theta \cdot \cos 3\theta - \cos 2\theta \cdot \cos 7\theta + \cos \theta \cdot \cos 10\theta }}{{\sin 4\theta \cdot \sin 3\theta - \sin 2\theta \cdot \sin 5\theta + \sin 4\theta \cdot \sin 7\theta }}$$
A. cot6θ.cot5θ
B. cos6θ.cos5θ
C. cos6θ.cot5θ
D. -cot6θ.cot5θ
Answer: Option A
This Question Belongs to Arithmetic Ability >> Trigonometry
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