If $\sec \theta + \tan \theta = \sqrt{3},$ then the positive value of $\sin \theta$ is :$\frac{\sqrt{3}}{2}$$\frac{1}{2}$$\frac{1}{\sqrt{3}}$$\sqrt{3}$

$\textbf{Directions : }$ Read the following passage carefully and answer questions based on the passage. Choose the most appropriate answer to each question, out of the f...