Question 9 - A-Level Maths

For $\cos \theta \neq 0$, prove that $$\operatorname { cosec } 2 \theta + \cot 2 \theta = \cot \theta$$ 9
Explain why $$\cot \theta \neq \operatorname { cosec } 2 \theta + \cot 2 \theta$$ when $\cos \theta = 0$