Hepatitis B is a viral infection that is primarily transmitted through sexual contact, but it can also be spread through other means such as:
- Contact with infected blood (e.g., sharing needles or other drug paraphernalia).
- From mother to child during childbirth.
- Exposure to contaminated blood products.
A 30-year-old patient presents with a history of flat lesions near the anal canal, rashes on the body, and hair loss that follows a particular pattern, as shown in the image. What is the diagnosis?
A patient presents with painful vesicles in the genital region. Identify the lesion shown in the image and choose the correct diagnosis.
If the value of \( \cos \alpha \) is \( \frac{\sqrt{3}}{2} \), then \( A + A = I \), where \[ A = \begin{bmatrix} \sin\alpha & -\cos\alpha \\ \cos\alpha & \sin\alpha \end{bmatrix}. \]