trigonomitry

[kristopherb]

how in the world do you do trigonomitry?

 

[brennan]

Silly old Harry, caught a herring, trawling off Afghanistan.

 

[Cheezy the Wiz]

how in the world do you do trigonomitry?

Well what part are you having problems with exactly? Give us specific questions/problems, and we'll respond to them piecemeal.

Silly old Harry, caught a herring, trawling off Afghanistan.

You might have to explain that one to him.

 

[nonconformist]

You're being extremely vague about exactly what needs to be known.

 

[kristopherb]

its extremly confuseing the thing about finding the right function

 

[Erik Mesoy]

You do trigonometry by listening to what's said in class, reading the textbook, and applying what you're then supposed to have learned.

You can try Wikipedia for help that doesn't require explaining your predicament to strangers on the Internet.

http://en.wikipedia.org/wiki/Trigonometry

 

[nonconformist]

its extremly confuseing the thing about finding the right function

 O                     A                       O
S H                   C  H                    T  A

Sine=Opposite/hypotenuse
Cosine=Adjacent/hypotanuse
Tan=Opp/Adj.

 

[Red Door]

SOH - CAH - TOA. Remember that.

 

[brennan]

You know how to use triangle formula?

 

[Aphex_Twin]

I find this image more useful.

From a point A on the unit circle lower a perpendicular onto the diameter. That segment is the sine (red).

From the center, take a perpendicular onto that first segment. That is the cosine (dark blue).

The segment that joins the extended diameter to A and touches the circle in only one point is called the tangent (brown).

The same for everything else.

Draw it a couple of times and it will remain in your head forever.

 

[brennan]

WTH??? you have the sides of a triangle marked sine and cosine? that'll just confuse him.

 

[Sidhe]

I find this image more useful.

From a point A on the unit circle lower a perpendicular onto the diameter. That segment is the sine (red).

From the center, take a perpendicular onto that first segment. That is the cosine (dark blue).

The segment that joins the extended diameter to A and touches the circle in only one point is called the tangent (brown).

The same for everything else.

Draw it a couple of times and it will remain in your head forever.

That's excelent I've never seen it put that well.

Trigonometry at least at it's basics is very simple once you memorise all the tricks and formulas. If your only at a school level that is. It can get a bit more tricky later but to be honest it's not that hard.

Edited: for simplicity.

 

[nonconformist]

You don't need to know any furhter than SOC-CAH-TOA at GCSE level.

 

[ainwood]

how in the world do you do trigonomitry?

Moderator Action: If you don't ask a specific question, then this thread will be closed.

 

[blackheart]

You don't need to know any furhter than SOC-CAH-TOA at GCSE level.

That and Side Angle Side (SAS), Rule of Sine, Rule of Cosine, Pythagoras' Theorem, etc. Basically pay attention in class and you'll learn about these.

 

[Sidhe]

You don't need to know any furhter than SOC-CAH-TOA at GCSE level.

True but then I have no idea what level he's at? Or what he's asking.

 

[nonconformist]

True but then I have no idea what level he's at? Or what he's asking.

He'll be asking at GCSE level, cos if it's A-level, he's screwed.

 

[Sidhe]

He'll be asking at GCSE level, cos if it's A-level, he's screwed.

indeed good point. Mind you I came to A' level after being out of education for 17 years and let me tell you at first I was pretty screwed

 

[brennan]

I assumed he was doing GCSE or he wouldn't be asking about trig generically. You guys are gonna scare the crap out of him with all the A'Level formulae.

 

[Sidhe]

I assumed he was doing GCSE or he wouldn't be asking about trig generically. You guys are gonna scare the crap out of him with all the A'Level formulae.

Probably best if I get rid of it then, what was I thinking?