Ok for the first time since leaving school some 15 years ago im stuck. So I thought I'd ask you lot as someone always seems to know the answer to every question asked. Here goes,
Draw a scaled phasor diagram to determine the equation for the resultant wave formed by adding the following 2 waves:
V1=12 Sin 314t
V2=8 Sin(314t +Pi/3)
I think ive got the resultant phasor to be 17.44 but the angle come to 23.41DEG but need to display as a proportion of pi.
Any suggestions..
Ah the forum doesnt like pi, hmm.

[Edited on 2/11/10 by simonwinn]

six.

42 ( the meaning of life)

Like your ever going to need that in life!!!

Good luck, come on LCB somebody must know?!!!

Blue Whale!

(sorry I haven't an effing clue what you're asking, but I did understand pie)

(I feel really thick now)

2 x Pi = 360 degrees

Did you not use that to draw the phase offset of V2 on your phasor diagram?

MMMMmmmm pie.

Mmmmmmmmmmmmm pie.

Looks right to me, so the equation they're asking for (with phase angle in radians - so 23.41 x (PI/180) = 0.41rad) would be...

V = 17.44sin(314t + 0.41)

That what you mean? Not sure what you mean by 'display as a proportion of PI', but if you must...

V = 17.44sin(314t + 0.13PI)

or even

V = 17.44sin(314t + PI/7.7)

but not sure why you'd want to express it that way.

I'm very rusty - could all be bollards

quote:

---

Originally posted by simonwinn
the angle come to 23.41DEG but need to display as a proportion of pi.
Any suggestions..

---

http://www.wolframalpha.com/input/?i=V1%3D12+Sin(pi+*+t)+%2B+8+Sin(pi*+t+%2BPi/3)+

Have a play with that

Thanks for the help guys.
V = 17.44sin(314t + PI/7.7) was the one the tutor was asking for, he would also of taken .41.
This is supposed to be as hard as it gets, I hope hes right as I'm only 2 months into the apprenticeship..

What are you doing rocket science?

3 year Maintenance Engineering Apprenticeship at the Toyota Factory near Derby.