Chapter 5: Problem 56
Find the derivative of the function. \(y=25 \arcsin \frac{x}{5}-x \sqrt{25-x^{2}}\)
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Chapter 5: Problem 56
Find the derivative of the function. \(y=25 \arcsin \frac{x}{5}-x \sqrt{25-x^{2}}\)
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Horizontal Motion The position function of a particle moving along the \(x\) -axis is \(x(t)=A e^{k t}+B e^{-k t},\) where \(A, B,\) and \(k\) are positive constants. (a) During what times \(t\) is the particle closest to the origin? (b) Show that the acceleration of the particle is proportional to the position of the particle. What is the constant of proportionality?
(a) Prove that arctan \(x+\arctan y=\arctan \frac{x+y}{1-x y}, x y \neq 1\) (b) Use the formula in part (a) to show that \(\quad \arctan \frac{1}{2}+\arctan \frac{1}{3}=\frac{\pi}{4}\).
Find the derivative of the function. \(f(x)=\arctan e^{x}\)
Modeling Data A valve on a storage tank is opened for 4 hours to release a chemical in a manufacturing process. The flow rate \(R\) (in liters per hour) at time \(t\) (in hours) is given in the table. $$ \begin{array}{|c|c|c|c|c|c|}\hline t & {0} & {1} & {2} & {3} & {4} \\ \hline R & {425} & {240} & {118} & {71} & {36} \\ \hline\end{array} $$ (a) Use the regression capabilities of a graphing utility to find a linear model for the points \((t, \ln R) .\) Write the resulting equation of the form \(\ln R=a t+b\) in exponential form. (b) Use a graphing utility to plot the data and graph the exponential model. (c) Use the definite integral to approximate the number of liters of chemical released during the 4 hours.
Prove or disprove: there is at least one straight line normal to the graph of \(y=\cosh x\) at a point \((a, \cosh a)\) and also normal to the graph of \(y=\sinh x\) at a point \((c, \sinh c)\) [At a point on a graph, the normal line is the perpendicular to the tangent at that point. Also, cosh \(x=\left(e^{x}+e^{-x}\right) / 2\) and \(\sinh x=\left(e^{x}-e^{-x}\right) / 2 . ]\)
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