Need help with my math lab here are the few i am having trouble with please help 1.) If the electric current, is the derivative of the charge q, and

Need help with my math lab here are the few i am having trouble with please help

1.) If the electric current, is the derivative of the charge q, and q'=  = , find the charge in terms of the variable t.

2.)An inductor in an electric circuit  for a 4 H inductor. Find the current in the circuit after 10 seconds.

Find a Maclaurin Series approximation for f(x) = cos(6x) where n = 5.