(Solved): Please answer all the questions Find the coterminal angle, , and the reference angle, , for 316 ...

Find the coterminal angle, $\theta$, and the reference angle, $\alpha$, for $\frac{16\pi }{3}$, where $0\le \theta \le 2\pi$. Present answer in exact radian form as a reduced fraction in terms of $\pi$. $\begin{array}{l}\theta =\square \\ \alpha =-\pi \end{array}$ Present answer in exact radian form as a reduced fraction in terms of $\pi$. Given the graph: Which of the following equations involving the cosine function represents the given graph. Assume that $A>0,B>0,C\in (-\pi ,\pi )$. $\begin{array}{l}f(x)=7\cos \left(\frac{1\pi }{6}x+\frac{3\pi }{4}\right)-4\\ f(x)=7\cos \left(\frac{1\pi }{6}x+\frac{3\pi }{4}\right)+4\\ f(x)=7\cos \left(-\frac{1\pi }{6}x+\frac{3\pi }{4}\right)+4\\ f(x)=7\cos \left(-\frac{1\pi }{6}x+\frac{3\pi }{4}\right)-4\end{array}$