If the value of \( \cos \alpha \) is \( \frac{\sqrt{3}}{2} \), then \( A + A = I \), where \[ A = \begin{bmatrix} \sin\alpha & -\cos\alpha \\ \cos\alpha & \sin\alpha \end{bmatrix}. \]
Reproduction in human beings involves the fusion of male and female gametes that produces in their reproductive system.
The male reproductive system comprises:
The female reproductive system is active before, during, and after fertilization as well. It comprises the following parts: