In: Advanced Math
4)Find the general solution of the following differential equation.
y''+4y=tan(x) -pi
5)A mass of 100 grams stretches a spring 98 cm in equilibrium. A dashpot attached to the spring supplies a damping force of 600 dynes for each cm/sec of speed. The mass is initially displaced 10 cm above the equilibrium point before the mass is attached, and given a downward velocity of 1 m/sec. Find its displacement for t>0.