# needs solution

Discussion in 'Math' started by shaider530, Jul 9, 2007.

1. ### shaider530 Thread Starter New Member

Jul 7, 2007
6
0
4i + 8 int idt - 3 di/dt = 50 cos(2t +75 degrees)
find the current?

2. ### shaider530 Thread Starter New Member

Jul 7, 2007
6
0
4i + 8$\int$ idt - 3 di/dt = 50 cos(2t +75 degrees)
find the current.

3. ### recca02 Senior Member

Apr 2, 2007
1,211
0
are you familiar with laplace transform?

4. ### shaider530 Thread Starter New Member

Jul 7, 2007
6
0
no im not familiar with laplace transform. what is that?

5. ### recca02 Senior Member

Apr 2, 2007
1,211
0
laplace transform is very useful for finding various parameters and solutions to complex circuits and equations.
u can get some idea abt it from here.
http://en.wikipedia.org/wiki/Laplace_Transform
u may for now have to solve the above equation using solution methods for differential equations.

6. ### omnispace Member

Jul 25, 2007
27
0
I think this is easiest with phasors...

4*I + (8*I)/(j*w) - 3*j*w*I = 50<75
w = omega = 2
4*I - (j*8*I)/2 - j*6*I = 50<75