1. The voltage of the power supply in an AC-DC coupled circuit is given by the function V(t) = 130sin (5t) +18, where t is time, in seconds, and V(t) is the voltage, in volts, at time t. Find the maximum and minimum voltages, and the times at which they occur. 2. Determine whether the function yensin x+ 2ncos x is a solution to the differential equationy = - Sty=0 dx23. Find the equation of the line tangent to the curve y = 2cosx - = sinx at x =: 4 Calculate the derivative of the function y = (x+ 1) cosx+ (x + 2) sinx atx = 0