<p>Time period of a simple pendulum is T. The time taken to complete&nbsp;<span class="equation">\(\frac{5}{8}\)</span>&nbsp;oscillations starting from mean position is&nbsp;<span class="equation">\(\frac{\alpha}{\beta}\)</span>T. The value of&nbsp;<span class="equation">\(\alpha\)</span>&nbsp;is______​​​​​​​</p>