for the function given state the starting point for a given period

Given:
[tex]f(t)=-\cos(\frac{2t}{\sin})+1[/tex]Find
The domain of function:
Explanation:
Time period of function is
The graph of given function is:
[tex]\begin{gathered} y=-\cos(2t-\frac{\pi}{4})+1 \\ \end{gathered}[/tex]The value is
[tex]-\cos(2t-\frac{\pi}{4})+1[/tex]Period is:
[tex]\begin{gathered} =(\frac{\pi}{8},1) \\ \\ \end{gathered}[/tex]