D [ 1. solve the problem. A weight is suspended on a system of spring and oscillates up and down according to P =0.1[3 cos(8t) - sin(8t)] where P is the position in meters above or below the point of equilibrium (P = 0) and t is time in seconds. Find the time when the weight is at equilibrium. Find all values of t, 0 = t = 1, rounded to the nearest 0.01 second. B j U FontFamiy M- A O FrECECQ @ #Z 0O w + @\\ \f3. Show that the functions f and g are identically equal. f(0) = csc 0 + cot 0, g(0) = _sine 1 - cos e B i U Font Family A A DE EE . O\fA square wave is built up from sinusoidal curves of varying periods and amplitudes. Graph the following function, which can be used to approximate the square wave. anfrx) % sn(3nx) ) = 4 O=x=4 L i) A better approximation to the square wave is given by sin{rx) % sin(3ro) + % sin(5mx)| f(x):% Osx