jordan

Well, Fiddler would because it was a play...

Those don't count as movies...I don't like them. Did they really have intermissions though?

Why would the government suddenly try to cover up military tests in place of aliens when that's what military tests have been their story all along?

Well, for one thing k would be a constant, not variable. But I think you hit upon what I've been trying to say. Inverse relationship means it's proportional and I would assume implies that it's actualy a function that we are questioning. Indirect just means that one goes down as the other goes up. There doesn't have to be any proportionality in it. Does that make more sense ecoli?

The greeks didn't have decimal notation or zero. I can tell you they calculated pi with inscribed and circumscribed polygons and determining that pi must be bounded between those two perimiters. But calculating the perimiters takes trig functions and I don't know how they found the trig ratios.

I guess if the concept of linear graphs bugs you then you can always think of them as a infinite number of points between two given points.

Intermission? What movie has ever had an intermission? LOTR Return of the King could've, but then again they could've just cut the last hour and you wouldn't have missed anything.

As I was always taught, indirect relationships are any function in which all x's decreases as y increases. A direct relationship would be one in which all x's increase as y increases. We don't use the term as much in school for calc as we do for economics.

I don't think the spaceship crashed at Area 51. I thought they were within a small distance of each other (bordering states) but not that Area 51 was built around the crash site.

Revealing what goes on at Area 51 might make a president really popular with the public but in Washington he wouldn't have any allies. I think the tradeoff wouldn't really help him that much in the long run.

Hahahaha...hey Sayo, me too...

Just a thought, is it critical to use identities/equations that were not derived from the pythagoriam theorum?

Ah...yep. That should work too. Nice work there.

All looks good to me.

Really, I wish I could be more help, but I don't this is the point where I origionaly had it and couldn't go much further for some reason. You seem to find some pretty clever ways to manipulate it though, so keep posting what you try.

I think there's another algebra mistake here. Let's distribute the 2 again: (2-2cos2x)+cos2x=cos3x It looks like you forgot the lone cos2 on the left side (maybe because of the errant equals sign?) Either way' date=' that boilds down to: 2-cos[sup']2[/sup]x=cos3x 2=cos3x+cos2x

I must say, excellent answer phi.

Well, let's just rearange this line for now: 2(1+tan^2x)-1=-cosx First thing is to distribute the 2: (2+2tan2x)-1=-cosx Then get rid of the parenthesis and subtract the 1 from the 2. That gives: 1+2tan2x=-cosx Use the identity tan2x=sin2x/cos2x to get: 1+2sin2x/cos2x=-cosx That's just a little different than your line: 2+2sin2x/cos2x=-cosx

There seems to be a mistake in this step. It should be 2+2tan2x-1 which equals 1+2tan2x.

How do you know I'm not really sensitive about that? I'm male.

jordan, 17, present why is first name required for this?

Yeah, you can only set the factors equal to the other side when the other side is zero. That's because only zero has the identity 0X=0 for all X's. So I would start by moving the secx to the other side which gives -1/secx, or -cosx. So now the equation is 2sec2x-1=-cosx or 2sec2x=1-cosx if you prefer. From there, I would look through yourdad's thread on trig identities and see what you can come up through manipulation: http://www.scienceforums.net/forums/showthread.php?t=9608

You converted 121.92cm to m before you calculations right?

I'd say just stick with a square-based pyramid and don't worry about the others, in which case you'd have the right SA formula except for one thing. I would add a 4 in front of the 1/2PH because that will give you the area of all of the triangular faces.

Ok, one more question for you. Can you sepcify exactly what shape we're working with here? Draw a picture or link to a picture of it because your formulas and descprition "triangular prism/ pryamid" seem to be leading in two different directions.