kiteman
Flying high!
Location: At the beach.
Member Since: 5th Jul 2004
Total posts: 245
Posted:I can't believe after all these years I've finally needed something I learned in maths but I've fogotten how to do it.

I can remember SOH CAH TOA but thats all. confused plus I don't have a caculator with those buttons on it. frown

I'm building a canopy and need to know the lenght of x and y

Hyp = 4000m
angle = 5 degrees


. . . . . .5
. . . . . ./I
4000 / .I x
. . . ./__I
. . . . y


If everything seems under control, your not going fast enough!

It's not the size of the wave, it's the length of the ride!

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flid
flid

Carpal \'Tunnel
Location: Warwickshire
Member Since: 27th Aug 2002
Total posts: 3136
Posted:the calculator in windows xp has those buttons if you switch to scientific mode

you wanna use sin and cos:

4000 sin 5 = x
4000 cos 5 = y

I think! (no guarantees if i'm wrong) I did engineering maths modules at uni and i'm not sure how i passed wink


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kiteman
Flying high!
Location: At the beach.
Member Since: 5th Jul 2004
Total posts: 245
Posted:Thanks for that.

I didn't know about scientific mode on the windows calc. that saved alot of hastle.


If everything seems under control, your not going fast enough!

It's not the size of the wave, it's the length of the ride!

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Fine_Rabid_Dog
Internet Hate Machine
Location: They seek him here, they seek ...
Member Since: 26th May 2004
Total posts: 10530
Posted:If I had a scientific calculator near by, I could do it for you... but I dont

But I was trained heavily on this subject... hehehe....

Who would have thought trig would come in useful?


The existance of flamethrowers says that someone, somewhere, at sometime said "I need to set that thing on fire, but it's too far away."

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J-J
member
Location: Perth, Australia
Member Since: 14th Jul 2005
Total posts: 41
Posted:isn't it:



y=4000sin5

x=4000cos5



because:

SOH stands for: Sin Opposite / Hypotenous (or however the one opposite the right angle is spelt)

CAH - cos adjacent / hypotenous



please excuse the spelling, I'm a mathematician not an english teacher

EDITED_BY: J-J (1121932360)


"I love deadlines. I like the whooshing sound they make as they fly by" - Douglas Adams

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flid
flid

Carpal \'Tunnel
Location: Warwickshire
Member Since: 27th Aug 2002
Total posts: 3136
Posted:yes, you are right, i was fooled by the ascii art. The lengths will be correct thou, and should be pretty obvious which is which wink

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Lycanthrope
Lycanthrope

The original drunk/stoned/vegetarian shapeshifter
Location: Blackhill, Australia
Member Since: 19th Apr 2005
Total posts: 209
Posted:awww i saw this thread and got all excited cause i thought it was one of those impossible integrals...........

Lycan:are you a citrus fruit?
Orange:no
Lycan:dam, i wanted to make citrus fruit pie.
*Lycan walks off completely unaware he has once again been outwitted by the intellectual orange*

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Gelfling
Gelfling

Watcher of 80s cartoons
Location: Chepstow & Bristol
Member Since: 7th Jul 2004
Total posts: 665
Posted:Are you sure that it is 4000m? That would mean that it is 4km wink

Anyway:
x = 3984.779
y = 348.623

JJ has it right the right way round with his calculation.

(got my girlfriend to do this one as she is a maths teacher)


>What do you think about the state of the Earth?
>I'm optimistic.
>So why do you look so sad?
>I'm not sure that my optimism is justified.

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Lavatwilight
Lavatwilight

old hand
Location: Wellington somerset, UK
Member Since: 11th Aug 2004
Total posts: 834
Posted:Lycanthrope
ok if dy=cos^3x

then what does y equal (∫cos^3x)

ok so its not compleatly unsovalbe but it is fun! :P


Drawings by chalk minds, strech between the stars

Kyle Mclean-
Contact without dance is like sex without wiggling.
A) it does feel as good
B) it does not look as good on film

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flid
flid

Carpal \'Tunnel
Location: Warwickshire
Member Since: 27th Aug 2002
Total posts: 3136
Posted:I did engineering maths at uni, I'm very happy to say I've forgotten practically all of it. Imaginary numbers and the operator j are distant memories smile

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vanize
vanize

Carpal \'Tunnel
Location: Austin, Texas
Member Since: 21st Aug 2001
Total posts: 3899
Posted:weird shape and size for a canopy - what are you making it for?

-v-

Wiederstand ist Zwecklos!

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J-J
member
Location: Perth, Australia
Member Since: 14th Jul 2005
Total posts: 41
Posted:Written by: Gelfling

JJ has it right the right way round with his calculation.




ubblol

ahem! That would be her calculation


"I love deadlines. I like the whooshing sound they make as they fly by" - Douglas Adams

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Gelfling
Gelfling

Watcher of 80s cartoons
Location: Chepstow & Bristol
Member Since: 7th Jul 2004
Total posts: 665
Posted:Sorry J-J - but in my defence you have no intro thread and it says not telling in your profile. In the UK JJ is short for Jason-John.

>What do you think about the state of the Earth?
>I'm optimistic.
>So why do you look so sad?
>I'm not sure that my optimism is justified.

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Matty_B
Matty_B

veteran
Location: Blu's Pocket
Member Since: 16th Feb 2005
Total posts: 1314
Posted:** wanders in wonders why I read it as Matts help, very confused, not going to be a good day **



Yep the maths looks ok to me . . . canopy - I guess this is reference to a kite of some sort then ?



** wanders out dazed and confused **

EDITED_BY: Matty B (1123575571)


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MiG
MiG

Self-Flagellation Expert
Location: Bogged at CG
Member Since: 16th Apr 2004
Total posts: 3415
Posted:4km kite? that thing'd lift you off the ground...

"beg beg grovel beg grovel"
"master"
--FSA

"There was an arse there, i couldn't help myself"
--Rougie

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Matty_B
Matty_B

veteran
Location: Blu's Pocket
Member Since: 16th Feb 2005
Total posts: 1314
Posted:Yep it would be . . . though I am not sure there are many beaches, big enough and i reckon you may need a dumper truck to carry it

might be 4000mm, 4m ?? but it has nothing to do with me so I have no idea. . . . smile


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VampyricAcid
VampyricAcid

veteran
Location: My House
Member Since: 27th Jun 2005
Total posts: 1286
Posted:if it was 4000mm, then it would be 5mm too, so it would still be a very odd shape

Proudly Owned By The BMVC

Are You Sniffing My Mitten?

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Matty_B
Matty_B

veteran
Location: Blu's Pocket
Member Since: 16th Feb 2005
Total posts: 1314
Posted:Surely

x = 3984.779mm
y = 348.623 mm

the 5 is degrees and that doesn't change with size

or have I got this all ass about tit


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