The given equation is:
[tex]h=7\cos(\frac{\pi}{3}t)[/tex]Divide both sides of the equation by 7:
[tex]\begin{gathered} \cos(\frac{\pi}{3}t)=\frac{h}{7} \\ \frac{\pi}{3}t=\cos^{-1}(\frac{h}{7}) \\ t=\frac{3}{\pi}\cos^{-1}(\frac{h}{7}) \\ \end{gathered}[/tex][tex]t=\frac{3}{\pi}\cos^{-1}(\frac{h}{7})[/tex]When h = 1
[tex]t=78.10s[/tex]When h = 3:
[tex]t=61.71s[/tex]When h=5
[tex]t=42.41s[/tex]h=1, t =78.10;
h=3, t=61.71;
h=5, t=42.41
.
