Can someone explain this problem to me and/or at least get me started?

Question

I have no idea what half of the words are in this problem, much less how to solve it. I'm not sure what equation(s) I would use to work it as well. If it's any hint we're working on trigonometric identities and inverses right now. Help would be much appreciated!

The equation θ2=tan^-1 (x C/G) gives the phase angle (in degrees) of impedance in the parallel portion of a distributed constant circuit. Find θ2 if x=190 radians per second, C=0.04 μF per kilometer, and G = 1.97 μsiemens per kilometer.

Answer 1

Hi Emily,

 

To be perfectly honest, you really don't need to know what the equation represents. It is an obscure physics/electrical engineering formula that you'll likely never see again. They give you a formula

θ₂=tan^-1 (x C/G)

which relates an angle with three quantities. The problem provides values for those three variables, so you can just plug them into the equation to find your answer.

 

x = 190 rad/s

C = 0.04 μF/km

G = 1.97 μS/km

 

θ₂=tan^-1 (190 * 0.04/1.97)

 

You can use your calculator to solve. (Your calculator may have an arctan button instead of tan^-1, but they mean the same thing.)