9. \( \cos \frac{-x}{p} x-\frac{1}{4} \cos \frac{2 n}{p} x+\frac{1}{9} \cos \frac{\pi}{p} x-\frac{1}{16} \cos \frac{4 \pi}{p} x \) 10. \( f^{\prime}(1)(x-1)-\frac{f^{\prime \prime}(1)}{3}(x-1)^{2}+\frac{f^{\prime \prime \prime}(1)}{5}(x-1)^{3}-\frac{f^{(4)}(1)}{7}(x-1)^{4}+\frac{f^{(5)}(1)}{9}(x-1)^{6} \)

\( 6xdx-2ydy=3x^{2}ydy-2x^{2}ydx \)

Question A toy rocket is launched from the ground with an initial velocity of 48 feet per second. The height of thenecket is modeled by \( h(t)=-16 t^{2}+48 t \), where \( h(t) \) is the height the rocket in feet, and \( t \) is the time in seconds. Which statement correctly describes the range of this situation? Answer The range means the rocket started at o feet and reached a maximum height of 48 feet.

\begin{tabular}{l|l} 6. Solve wave equation \( u_{t t}-c^{2} u_{x x}=0 \) by method of seperation \\ of variable, when seperation constant is positive. \end{tabular}

h) \( \int \frac{d x}{\operatorname{sen} 5 x}= \)

\( \begin{array}{ll}y+z)^{2}+x+z=4 & \text { Poevo: } \\ \text { Hallar } \frac{\partial z}{\Delta x} & \\ & \end{array} \)