Find the general values of `theta` from the following equations:
i) `cos^(2)theta=1/4`, ii) `sin^(2)theta=1`, iii) `cot^(2)theta=3`, iv) `sec^(2)theta=4/3`

Explanation

To find the general values of \( \theta \) for the given equations, we will solve each equation step by step.

### i) \( \cos^2 \theta = \frac{1}{4} \)

1. Take the square root of both sides:
\[ \cos \theta = \pm \frac{1}{2} \]
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