If `pi lt theta lt 2pi` then `sqrt ((1+cos theta)/(1-cos theta))=` a. `cosec theta+cot theta`, b. `cosec theta - cot theta`, c. `cot theta-cosec theta`, d. `-cosectheta - cot theta`

Explanation

To solve the problem, we need to simplify the expression \(\sqrt{\frac{1 + \cos \theta}{1 - \cos \theta}}\) given that \(\pi < \theta < 2\pi\).

### Step-by-Step Solution:

1. **Start with the given expression:**
\[ \sqrt{\frac{1 + \cos \theta}{1 - \cos \theta}} \]
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