Explain why the inequalities

Nr2 sin(∆φ) ≤ Cr ≤ Nr2 tan(∆φ)

Question

Explain why the inequalities

Nr2 sin(∆φ) ≤ Cr ≤ Nr2 tan(∆φ)

anonymous · Answer

What does this inequality pertain to?

anonymous · Answer

here is the entire question

anonymous · Answer

it is the last one number 5 please look at it and see if you can find anything

anonymous · Answer

Exactly which part of this is giving you trouble?

anonymous · Answer

everything about number #5 the last problem with the triangle i can't figure it out at all

anonymous · Answer

I will get you started, then.  The coordinates for Q' are 
$$(r,r\tan(\theta))$$
and the coordinates for Q are
$$(r\cos(\theta), r\sin(\theta))$$

anonymous · Answer

yea that is definitely a start thank you

anonymous · Answer

For the part with the inequalities, draw pictures of the circles and think about the words "inscribe" and "circumscribe" as they pertain to this situation.  Google them if you need to.  Normally I'd be more forthcoming and less cryptic with these questions but given that it's a mid-term, I really can't.

anonymous · Answer

ok thank you very much i really appreciate it

anonymous · Answer

No problem, good luck

anonymous · Answer

thanks