Recent content by lubo

If I use the triangles N - B - O: Cos θ = adjacent/hypotenuse = 6000 (radius (r)) /6000 (Radius (r)) θ = (arccos(1)) = 0° Surely this cannot be true? If I have found this angle correctly then I can use this by taking 90 - answer = my Theta for the highest point to see. As...

Hi, I appreciate all of your comments and I have tried to redraw the question. I understand what you are telling me about you can see point G from a higher point on the circle. I have drew the diagram to show this more clearly and with all the data I have. I clearly still do not know how...

Yes you are correct. Yes that is correct. Yes you are correct. I am trying to find the largest theta where the point G can still be visible on the circle with the data given. What is this angle or the best way to find it please? Thanks

I am trying to find theta. This is at point O on the diagram. It is not really perfectly drawn in that it looks like it cuts at 45 degrees on the right angle, but this is not the case. If you followed the circle around to point N, then you can no longer see point G. The problem does not...

Homework Statement A circle with a radius (r) of 6000km. From the centre of the circle to a point in the distance G where another person is standing is R = 40000 km. Calculate the angle (θ) that the observer has to stand at point (O), to allow the observer to see the distant point G. If the...

Why should 1 = 1+A Why 2 = B-3A Why 3=9-3B I found 9-3B = 3 because I put x = 0 in (x^2 + 2x + 3) This is what I am failing to understand i.e. why choose these and not just Zero? Thanks again as I realize this must be obvious to you.

micromass HallsofIvy How did you find the Coefficients as I thought you could automatically say that they are equal to Zero?

I have changed it to reflect what you mean, thanks.

Homework Statement For the equation shown below: x2+2x+3 / (x2+9)(X-3) = Ax+B/(x2+9) + C/(x-3) Find A, B and C Homework Equations The Attempt at a Solution C = 1 B = 2 A = ? Find C which = 1 by putting x=3 and working out x2+2x+3/(x2+9), then multiply out equation...

got it!

10y= 103.8*100-0.2 10y=103.8*(102)-0.2 10y=103.4 Now how do I find y? Thanks.

Homework Statement Calculate the value of y in the expression below: 10y = 103.2 × 102.4 × 10-1.8 × 1000.3 × 100-0.5 Homework Equations The Attempt at a Solution 10y= 103.8*100-0.2 Don't know how to move on from here as have no other examples like it? I am thinking I can use logs, however...

I have found the X2 tag, thanks. Sorry about that, yes it should be on the Left hand side (LHS) "(R1+(1/jwc1))", I hope this is what you meant. All I wanted was confirmation that the answer I had in my book was not correct. It is frustrating looking at something that should be correct and...

Yes, thanks, ZC = 1/jωC (= -j/ωC) happy new year, to you also "Tiny"-Tim with "big" answers :smile: That is what I thought, the answer must be wrong. It goes like that for a long time, so the autor definitely thinks it is right? If the full question is: show that the I(current)...

Thanks for looking at it, but rather than presume, I was meaning that this is what has been done to get to the next stage. The start is o.k, the problem is as mentioned. The left hand side does not make sense to me and I am trying to figure out why this has been done. If you have any ideas...