Yes, I've Googled, nothing helpful has came up. All I need is the formula - that I've forgot. Maybe it's sine, cosine or tangent...

I've drawn it up in paint.

Please don't only tell me the answer, I want to know how to do these by myself. All it is is a simple formula... eg. (height x width) divided by 304.1982...

Cheers for any help!

Sohcahtoa, foo'.
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Ah, sohcahtoa, now I remember. God how they pushed that into us in grade 9...

So tangent x (4 divided by 2.5)?
tan ? = 4km/2.5km
that is, tan inverse 4/2.5 i think

edit: i mean the unknown angle is tan inverse 4/2.5
tan ? = 4/2.5

therefore... ? = tan inverse 4/2.5

"When I grow up, I wanna be a vampire bat"

EDIT: Erm, that's a little unclear looking. That's an inverse tangent.

.....-1
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I don't get it - tan inverse?
**** it. My post sucks. Get a graphing calculator, hit 2nd -> tan(x) and input (opp/adj) into the argument.
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^ It shows up as Tan-1 on the calculator.

At least I think it does...
Quote by BGSM
I don't get it - tan inverse?

it should be on your calculator somewhere. it's a tan with a tiny "-1" on it
"When I grow up, I wanna be a vampire bat"

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EDIT: Erm, that's a little unclear looking. That's an inverse tangent.

.....-1

Ah, okay - in Australia my maths teacher just calls it "tan-1," haha...

Anyone got a good online scientific calculator? I don't have one at home, and 'Calculator.com' sucks.

So it's (tan-1)(4/2.5) to find the angle I'm looking for?
Quote by BGSM
I don't get it - tan inverse?

Should look like tan-1 on your calculator.

Basically, you put a degree value into tan, and it spits out the corresponding number. You put that number into inverse tan, and it should spit out that original degree value. So inverse tan is basically the opposite function to tan.

And that's really a shitty explanation, but it's 2:30AM, so cut me some slack.

Edit: UG doesn't support superscript/subscript tags? Meh.
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I'm pretty sure I've got it now, thanks for all of your help.

I feel a little less dumb, and a bit more knowledgeable now. Trust me, I'm a really good English, music and art student, but terrible at maths and science.
Quote by BGSM

So it's (tan-1)(4/2.5) to find the angle I'm looking for?

yup
"When I grow up, I wanna be a vampire bat"

Not Phyics, mathematics, repeat this is mathematics, not physics

Trigonometrey to be exact
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And that guy, who had that idea, one time

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THE SIMIAN σƒ τλε τρπ βπστλεπλσσδ

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Not Phyics, mathematics, repeat this is mathematics, not physics

Trigonometrey to be exact

Basic physics is literally just the application of mathematics to describe the motion/behaviour of physical objects. Mathematics is not necessarily physics, but physics is necessarily mathematics.
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59 degrees

EDIT:

It it Physics, Physics is pretty much Mathematics though - this is just applying trig at the moment.
Last edited by BGSM at Oct 6, 2008,
Quote by uberphreak
Basic physics is literally just the application of mathematics to describe the motion/behaviour of physical objects. Mathematics is not necessarily physics, but physics is necessarily mathematics.

That's not physics though, that has nothing to do with the movement of an object it's purely about angles, therefore not physics.
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╠═══════╬═══════╣

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╠═══════╬═══════╣
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That's not physics though, that has nothing to do with the movement of an object it's purely about angles, therefore not physics.

True. I wasn't thinking specifically about his post. Perhaps it's part of a larger problem?
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Sohcahtoa, foo'.

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wen i ask they say that they fall into the habit smhw ........but nyways i think there is a connection smwhere. Now i being a teetollar will not give into this habit nyhw

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Last edited by el-ECTRO at Oct 6, 2008,
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Man, I always learned "some old horse caught a horse taking oats away."

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Yeah, it's for a larger problem. I needed to find out the angle to state the displacement from A to C - East58degrees.
Someone has probably already said this, but this is not physics. It's trigonometry...lern 2 math
It could be a vector problem. Which is physics.
Quote by gunther_sucks
It could be a vector problem. Which is physics.

TS, is it a vector problem?
Yes, it is.
Oh...Well I stand corrected, goes to show what I get for not reading past the first post :-)
Haha, no problem. I'm onto question 7 now - which is really annoying. You have to work from a tiny graph, and there's no formula that you can work from - so the answer is most likely inaccurate.
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Somehow i don't think I will, but now when ever i'm in an exam i'm going to get distracted, dam you!!!

btw TC, inverse tan^-1 is the same as 1 over tan... I don't know if that clears anything for you, but oh well.
vectors is still maths.

Ever take calc in three dimensions?