MATLAB Exercises Help: Solve Series RC Circuit & Plot Circle

[apollon]

Hello guys I'm totally new to MATLAB and i would like help solving the problems i have with my homework,I have these two excercises and don't even know where to begin

1st:
When a dc voltage E volts is switched on a cross a series RC circuit at t=0(s),the variation of the capacitor voltage with time is given by
Vc(t)=E(1-e^(-t/x)
x=R*C
E=10V
R=1000 oms
C=1mF
I need to use MATLAB to plot the voltage across the capacitor for t=0 to 6 time constants

2nd:
I need to develop a program to perform the following tasks :
1.Draw a circle on a 2-d plan,make your program promt te user for the following values:(a,b) is the centre of circle,radius r and number of points N.

Hint:you need to start by creating a vector of angels(use linspace function)
Equation of circle using the trigonometric functions sine and cosine as
x=a+rcost
y=b+rsint

2.After plotting the circle create a menu wuth two options.
If the user enters option 1 the program calculates the area of the plotted circle
If the user enters option 2 the program calculates the circumference of the circle


I need to do this homework as soon as possible,I missed the classes tha were teaching these stuff due to being sick and I'm now in risk of being hold back a year,any help would greatly appreciated

 

[Polyamorph]

You have not made any attempt at answering your homework questions yourself. We are not here to do your homework for you, we will help, however, if you make an attempt at doing it for yourself. If you are completely new to MATLAB then the first thing you need to do is follow a MATLAB tutorial, either online or following the help in the MATLAB program itself. Then you need to make an attempt and solving the problems and report back to us when you get stuck. Cheers