Need Trigonometry Help
Lee Michaels
high school math right now. Here is the problem. Hopefully one of you will
have the info/knowledge handy.
I have a simple cabinet that has a 12 degree, low pitched top. The top can
not exceed the back or front. What would the length of the top be for each
horizontal foot? Put another way, for each foot horizontally, how long is
the angled top? I don't have a depth yet, but can calculate the top piece
easily enough once I get the above info.
Thanks,
Lee
Old Guy
triangle, the horizontal measurement is the adjacent side. cos angle
= adjacent side /hypotenuse. Hypotenuse =adjacent side/cos
12degrees.
My calculator says that for each 12" distance on the horizontal, the
top sloped at 12 degrees will be 12.2681 inches long.
Somebody check me!!!
Old guy.
On Nov 29, 10:11 pm, "Lee Michaels"
CW
"Old Guy" <wa...@q.com> wrote in message
news:1d7f33c7-3fc5-4b6d...@9g2000yqa.googlegroups.com...
My memory of trig says that the top is the hypotenuse of the right
triangle, the horizontal measurement is the adjacent side. cos angle
= adjacent side /hypotenuse. Hypotenuse =adjacent side/cos
12degrees.
My calculator says that for each 12" distance on the horizontal, the
top sloped at 12 degrees will be 12.2681 inches long.
Somebody check me
_________________________________________________
You're right
Lee Michaels
"CW" <cmagers@earthlink...net> wrote in message
news:HK6dnQgRAL7Szo7W...@earthlink.com...
That will free up some time for me tomorrow to work on some other things.
The wreck is a resource.
Swingman
> And I can't remember
> high school math right now.
Feel your pain ... took every math course HS/university had to offer and
now would welcome a calculator to add up the points on them dominoes in
my hand. :(
--
www.e-woodshop.net
Last update: 10/22/08
KarlC@ (the obvious)
Lee Michaels
"Swingman" wrote
> Lee Michaels wrote:
>
>> And I can't remember high school math right now.
>
> Feel your pain ... took every math course HS/university had to offer and
> now would welcome a calculator to add up the points on them dominoes in my
> hand. :(
>
> --
Yep, we ain't spring chickens any more.
The funny thing is that some things, I remember very well and some things
not at all. Even math things.
And there appears to be no rhyme or reason about what is retained and what
is not.
Larry Jaques
<leemichaels*nadaspam*@comcast.net> scrawled the following:
Young punk kid, bringing his homework here. <grumble, grumble> ;)
--
Some days, it's not even worth chewing through the restraints.
Swingman
No kidding ... as a young Ist LT FO, and when under heavy fire and
needing an immediate "danger close" fire mission, I used to radio in
what we in the artillery referred to as "black magic" fire missions.
Instead of radioing the guns a "right 200, drop 200, FFE" correction and
let the FDC figure the commands to the gun, I would radio the actual
elevation and deflection settings for all six guns at once, saving time
and possibly lives (mine included, which was probably the biggest
incentive) ... try that with bullets whizzing by. :)
Now I'm lucky to set the right fraction on the table saw fence half the
time, and nothing brings more trial and error than figuring what angle
to cut!!
Robatoy
wrote:
That /is/ strange the way the memory selects what to retain and what
not. The thing that gets me, is those moments when I say to myself: "I
KNOW that I KNOW this, but it won't come to me." Then, usually after 3
deep breaths, the fresh oxygen uncorks some of those memories and then
I suddenly remember.
Try that method. It works.
Morris Dovey
> "Swingman" wrote
>
>> Lee Michaels wrote:
>>
>>> And I can't remember high school math right now.
>> Feel your pain ... took every math course HS/university had to offer and
>> now would welcome a calculator to add up the points on them dominoes in my
>> hand. :(
>>
>
> The funny thing is that some things, I remember very well and some things
> not at all. Even math things.
>
> And there appears to be no rhyme or reason about what is retained and what
> is not.
Me too:
http://www.iedu.com/DeSoto/Projects/CNC/trig.html
--
Morris Dovey
DeSoto Solar
DeSoto, Iowa USA
http://www.iedu.com/DeSoto/
Lee Michaels
"Swingman" wrote in
>
> No kidding ... as a young Ist LT FO, and when under heavy fire and needing
> an immediate "danger close" fire mission, I used to radio in what we in
> the artillery referred to as "black magic" fire missions.
>
> Instead of radioing the guns a "right 200, drop 200, FFE" correction and
> let the FDC figure the commands to the gun, I would radio the actual
> elevation and deflection settings for all six guns at once, saving time
> and possibly lives (mine included, which was probably the biggest
> incentive) ... try that with bullets whizzing by. :)
>
These day, with targeting computers, laser guided and GPS bombs/shells. such
traditional math skills are probably not needed any more.
Oops, sorry about that. Am I making you feel old again? ;)
Gordon Shumway
I couldn't figure out the formulas for triangles until I was taking
College Algebra being taught by a High School teacher.
He said all you have to do is remember is Chief Sohcohtoa (So-Ka-Toa)
If you remember his name you will remember the formulas:
SOH means: Sin = Opposite over Hypotenuse
COH means: Cos = Opposite over Hypotenuse
TOA means: Tan = Opposite over Adjacent
Greg Neill
> I couldn't figure out the formulas for triangles until I was taking
> College Algebra being taught by a High School teacher.
>
> He said all you have to do is remember is Chief Sohcohtoa (So-Ka-Toa)
>
> If you remember his name you will remember the formulas:
>
> SOH means: Sin = Opposite over Hypotenuse
>
> COH means: Cos = Opposite over Hypotenuse
>
> TOA means: Tan = Opposite over Adjacent
And don't forget that the squaw on the hippopotamus is
equal to the sum of the squaws on the other two hides.
FrozenNorth
Correction:
CAH - Cos = Adjacent over Hypotenuse
--
Froz...
The system will be down for 10 days for preventive maintenance.
Charlie Groh
wrote:
...heh...I'd just lay out a 12 degree line from the corner of a square
piece of whatever, measure out 12" on the square side, square up to
the angled line and then measure *that*...
cg
Lee Michaels
"Charlie Groh" <chas...@dslextremerage.com> wrote in message
news:k818h5p4k10bo075l...@4ax.com...
I am not sure of the dimensions just yet. That will change within the next
week. I needed to know the dimensions of the top piece to determine
materials size/costs.
When working for others, sometimes you have to jump through hoops tht you
never would otherwise.
Mike Marlow
>
> ...heh...I'd just lay out a 12 degree line from the corner of a square
> piece of whatever, measure out 12" on the square side, square up to
> the angled line and then measure *that*...
>
Won't work - too simple, does not involve anything from Leigh Valley, does
not require any additional "how do I..." posts, does not leave room for an
ethics statement highlighting the superiority of the poster's own personal
sense of ethics (which apparently must apply to everyone else), and most
importantly - it's something one could do on one's own, without posting a
"how do I..." to the newsgroup.
Get with the program Charlie...
--
-Mike-
mmarlo...@windstream.net
Mike Marlow
"Lee Michaels" <leemichaels*nadaspam*@comcast.net> wrote in message
news:008fd76c$0$17157$c3e...@news.astraweb.com...
>
> Normally I would do that. But I don't have access to the actual cabinet
> and I am not sure of the dimensions just yet. That will change within the
> next week. I needed to know the dimensions of the top piece to determine
> materials size/costs.
Yeahbut you can lay it out on paper, and then you'll have your answer.
>
> When working for others, sometimes you have to jump through hoops tht you
> never would otherwise.
>
No... say it ain't so Joe...
--
-Mike-
mmarlo...@windstream.net
Tim W
draw out the triangle for a problem like that. Mathematicians call it the
Graphical Method.
Tim W
Gordon Shumway
Oops. That's exactly what I meant to say!
I can't understand why Spell check didn't catch that! :-(
Gordon Shumway
What color do Smurfs become when they hold their breath?
Lew Hodgett
"Swingman" wrote
> Now I'm lucky to set the right fraction on the table saw fence half
> the time, and nothing brings more trial and error than figuring what
> angle to cut!!
Which is why I use trig to layout angle on a piece of hardboard.
Do it right and you get the complimentary angle as a freebie.
Lew
whit3rd
wrote:
> "Charlie Groh" <chasg...@dslextremerage.com> wrote in message
>
> news:k818h5p4k10bo075l...@4ax.com...
>
>
>
> > On Sun, 29 Nov 2009 21:08:33 -0800, "CW" <cmagers@earthlink...net>
> > wrote:
>
> >>"Old Guy" <wa...@q.com> wrote in message
> >>news:1d7f33c7-3fc5-4b6d...@9g2000yqa.googlegroups.com...
> >>My memory of trig says that the top is the hypotenuse of the right
> >>triangle, the horizontal measurement is the adjacent side. cos angle
> >>= adjacent side /hypotenuse. Hypotenuse =adjacent side/cos
> >>12degrees.
>
> >>My calculator says that for each 12" distance on the horizontal, the
> >>top sloped at 12 degrees will be 12.2681 inches long.
>... I needed to know the dimensions of the top piece to determine
> materials size/costs.
The material has to be oversize, though; you're gonna have to start
with
a s4s board, assuming 3/4 thickness, that is as wide as the distance
from TOP/UPPER edge to BOTTOM/LOWER's perpendicular projection onto
the upper surface, if the board is to be beveled
Instead of 12" ==> 12 / cos(12 degrees) = 12.26809"
it's 12" ==> 12/cos(12 degrees) + 3/4 * sin(12 degrees)
= 12.42402"
Larry Jaques
<leemichaels*nadaspam*@comcast.net> scrawled the following:
>
You poor dear, Lee. You're coming down with Somesheimers Disease!
Larry Jaques
<gnei...@MOVEsympatico.ca> scrawled the following:
That's as bad (and non-PC) as the resistor color code:
-Bad Boys Rape Our Young Girls But Violet Gives Willingly.
Black, brown, red, orange, yellow, gray, blue, violet, green, white.
And the planets, which is now invalidated since they don't consider
Pluto a planet any longer. (Wah!)
-Mr. Victor Eats Many Jam Sandwiches Until Nicely Plump.
Mercury, Venus, Earth, Mars, Jupiter, Saturn, Uranus, Neptune, Pluto.
krw
<novalidaddress@di\/ersify.com> wrote:
>On Mon, 30 Nov 2009 12:29:46 -0500, the infamous "Greg Neill"
><gnei...@MOVEsympatico.ca> scrawled the following:
>
>>Gordon Shumway wrote:
>>
>>> I couldn't figure out the formulas for triangles until I was taking
>>> College Algebra being taught by a High School teacher.
>>>
>>> He said all you have to do is remember is Chief Sohcohtoa (So-Ka-Toa)
>>>
>>> If you remember his name you will remember the formulas:
>>>
>>> SOH means: Sin = Opposite over Hypotenuse
>>>
>>> COH means: Cos = Opposite over Hypotenuse
>>>
>>> TOA means: Tan = Opposite over Adjacent
>>
>>And don't forget that the squaw on the hippopotamus is
>>equal to the sum of the squaws on the other two hides.
>
>That's as bad (and non-PC) as the resistor color code:
>-Bad Boys Rape Our Young Girls But Violet Gives Willingly.
>Black, brown, red, orange, yellow, gray, blue, violet, green, white.
Get Some Now
Gold(5%), Silver(10%), None (20%)
Charlie Groh
...yes SIR! ;0)
cg