Is this even the right category?

[Zoi]

How do I calculate this?
I got this:
(0.7<-45 * 0.8)/(1-0.7<45*0.6<90)
I know that the basics are these:
(r1< θ1) * (r2<θ2)=r1*r2< θ1+θ2
(r1< θ1) /(r2<θ2) = r1/r2 < θ1-θ2
but the "1-.." confuses me.

I should clarify that the symbol "<" represents the angle (degrees)

Sorry for posting it (probably) at the wrong place

 

[stapel]

How do I calculate this?

What is the "this" that you're needing to "calculate"?

I got this:
(0.7<-45 * 0.8)/(1-0.7<45*0.6<90)

From whence did you "get this"? How?

I know that the basics are these:
(r1< θ1) * (r2<θ2)=r1*r2< θ1+θ2
(r1< θ1) /(r2<θ2) = r1/r2 < θ1-θ2

You know "that the basics" of what "are these"?

but the "1-.." confuses me.

What "1-..."? Where? What do you think it ought to be?

 

[Zoi]

What is the "this" that you're needing to "calculate"?


From whence did you "get this"? How?


You know "that the basics" of what "are these"?


What "1-..."? Where? What do you think it ought to be?

Uhmm I have a scattering matrix and I am trying to find the voltages in a microwave network.
I know the answer is 0.733<-157.9 (because it is in my notes) but I can't figure out how it gets there.
If you can explain or give me a clue about where I should look it's ok. If you find it too abstract, uhmm it's ok I guess.

 

[Deleted member 4993]

How do I calculate this?
I got this:
(0.7<-45 * 0.8)/(1-0.7<45*0.6<90)
I know that the basics are these:
(r1< θ1) * (r2<θ2)=r1*r2< θ1+θ2
(r1< θ1) /(r2<θ2) = r1/r2 < θ1-θ2
but the "1-.." confuses me.

I should clarify that the symbol "<" represents the angle (degrees)

Sorry for posting it (probably) at the wrong place

Try

1 ≡ (1 < 0)

 

[Zoi]

Try

1 ≡ (1 < 0)

I tried that. How can I subtrack the angles?
Can I change it to this: 1-0.7*0.6(cos(135)-isin(135))?

 

[Deleted member 4993]

I tried that. How can I subtrack the angles?
Can I change it to this: 1-0.7*0.8(cos(135)-isin(135))?

Where did that come from?

Irrespective of that, yes - that is what I suspect you need to do (I suspect these are 2-D phasors). But your class note should guide you.

 

[Zoi]

Where did that come from?

Irrespective of that, yes - that is what I suspect you need to do (I suspect these are 2-D phasors). But your class note should guide you.

Sorry I meant to write 0.6
Been struggling with this all day long, got it mixed up in my head
Perhaps I didn't explain my problem well. I can't find anything in my native language (which is Greek) and can't search the web for the right methodology.
I just have the result. The procedure is skipped. I know you wont write down every note there is, but if I got an example of how it is solved I would figure out how to use it the next time. Again if it is too much to ask, give me a search keyword. If that is too much as well, thank you for your time

 

[Deleted member 4993]

1-0.42[cos(135)-isin(135) = (1 + 0.42/√2) - i (0.42/√2) ← denominator

numerator → (0.7<-45 * 0.8) = 0.56/√2 - i 0.56/√2

Now do the division (using complex numbers)

 

[Zoi]

1-0.42[cos(135)-isin(135) = (1 + 0.42/√2) - i (0.42/√2) ← denominator

numerator → (0.7<-45 * 0.8) = 0.56/√2 - i 0.56/√2

Now do the division (using complex numbers)

Thank you kind sir! I just have one question.
Why is it 1+0.42/√2 and not 1-0.42/√2?

 

[Deleted member 4993]

Thank you kind sir! I just have one question.
Why is it 1+0.42/√2 and not 1-0.42/√2?

cos(135°) = - 1/√2

 

[Zoi]

cos(135°) = - 1/√2

Oh yes thank you so much!