Question:
Evaluate the following integrals:
(i) $\left(\frac{1-\cos 2 x}{1+\cos 2 x}\right) d x$
(ii) $\left(\frac{1+\cos 2 \mathrm{x}}{1-\cos 2 \mathrm{x}}\right) \mathrm{dx}$
Solution:
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