10(sin(pi(x-9)/6))+3 convert it into cosine function
\(10(sin(\frac{\pi(x-9)}{6}))+3\\ =10(cos(\frac{\pi}{2}-\frac{\pi(x-9)}{6}))+3\\ =10(cos(\frac{3\pi}{6}-\frac{\pi x-9\pi}{6}))+3\\ =10(cos(\frac{\pi x+12\pi}{6}))+3\\ =10cos(\frac{\pi x}{6})+3\\\)
