The image shows three integral problems, with a request to evaluate them using techniques such as the Residue Theorem (especially for the first one). Let’s break them down:

1. First Integral: $\int_0^{2\pi} \frac{\cos 2\theta}{5 + 4\cos \theta} \, d\theta$ This looks like a standard integral where we can apply the Residue Theorem from complex analysis by transforming the trigonometric terms into complex exponential form.

2. Second Integral: $\int_0^{2\pi} \frac{d\theta}{(5 - 3\cos \theta)^2}$ This integral involves a similar trigonometric function in the denominator, and likely involves another complex substitution or residue approach to solve it.

3. Third Integral: $\int_0^{2\pi} \frac{\sin 3\theta}{5 - 3\cos \theta} \, d\theta$ This one also can be approached using the Residue Theorem, where you need to transform the sine and cosine terms into exponential functions for easier integration.

Would you like me to start solving the first integral using the Residue Theorem? Then we can move to the next ones step by step. Let me know if you want detailed explanations for each step!