How is your Trig?

[Swift828]

I need a little help with a math function for calculating the angle of a right-triangle, Opposite Side: 5"|Adjacent Side: 34"| Hypotenuse: 34.375"|

If you can find the angle for the Adjacent and Hypotenuse corner, I would be very happy if someone could figure this out, I've been out of highschool for too many years to remember this crap. So if you wana make me look good for my boss and the client... let me know the angle of Degree'sº.

Thanks.

[zero]

These are easy, just remember SOH CAH TOA

Sin(Adjacent Angle) = (O)pposite / (H)ypotenuse

so for the adjacent angle just do inverse sine of 5/34.375, which is 8.36 degrees according to my calculator.

Or do inverse cosine of 34/34.375, which is 8.47 degrees. I think your triangle is a little out of square :lol:

[Swift828]

ya the 34.375 is a round up to 34"3/8's ok thanks, i knew i used sine somewhere i just didnt know i multiplied sin(adjacent)=opposite/hypot.

apprecaite it very much, im too sick to deal with the design right now because writting a parametric formula with the flu is too much brain work. ill have to figure out how to convert that math equation into a formula that'll work with excel, thanks again.

Swift~

[Swift828]

zero with your formula im getting a false statement, which makes a lot of sense, sin(34)=5/34.375 isnt correct, that is forcing sin(34) to equal what 5/34.275 equals which isnt equal. SOH CAH TOA i havent seen that since 11th grade geometry. Teehee, anyways I also didnt get the 8.36 that you did, My formula's give me a different variable. Im looking to write a formula that will equal the degree's of that angle.

Thanks for all the support.

[Triple_6]

I'm too tired to fuck with this and my calculator is out of batteries, but zero's calculator might be set to radians, which means what you are really getting is radians and you need to convert them to degrees (multiply the radian by 180/pi). SOHCAHTOA should be giving you the right answer...

[Swift828]

My calculater is excel, my formula that i want is TAN-1*(value)=xº but i cant figure out how to do this. im either going to have to buy a ti-83 to do the math, but even still i need to know how to write this out.

thanks for any more help that i get on this in the future

Swift~

Ps: Forgive the spellcheck.

Also keep in mind I am trying to convert a decimal to an angle. So for my value lets use for example .147

[Triple_6]

That's the inverse of tangent, not tangent raised to the -1 power.

[zero]

It's not for radians, because the value I got was bigger than 2Pi, I know it's right. If it really is a right triangle then A*A + B*B = C*C. But if you do the math it doesn't come out right, so I think those values are somewhat rounded, because 5^2 + 34^2 does not equal 34.375^2. So my formula is right, his triangle isn't.

If you want Tan-1 ( which is inverse tangent, not tangent to the -1 ), then it's just Tan-1( 5 / 34 ) = xº
TOA = Tangent of angle = (O)pposite / (A)djacent

[Swift828]

Ya you're definately right. This is all the first time I've used math since high-school. I'm a little bit out of touch.


Yes zero its rounded from 34.33098 I believe, Zero I am positive you're correct but excel is not allowing my formula to work. Tan-1(5/34)=error tan^-1(5/34)=error

I am still a newbie when it comes to Excel but regardless its apart of my career so I must learn and learn fast. Thanks for all the help and any more tips tricks pointers or other information would be greatly apprecaited.

PS- If you were wondering what this is all for; I'm designing a high-end kitchen hood for cabinet makers to be able to spit the parts, how its cut, and how its assembled in about 2seconds and be able to have full reports, lists, and G-code for heavy CNC machines to run. which is what manufactorer's for computer desks, tables, ect. Like the little smooth edges on the sides of your table tops. :) But this particular model is a high-end kitchen hood.

PSS- When I complete the product I'll resave it as a JPG after I render it so you all can see how nice and shiney a kitchen hood made out of mahogany or maple would look like. it's pretty nice

[Triple_6]

I got a C in Cal 1 and barely escaped Cal 2 with a D. I'm right there with you lol. Zero is our resident genius.

[Swift828]

=DEGREES(TAN(5/34))

8.487109º


Thanks for the help

[LaRoacha2]

A wood kitchen hood, that's new. Won't the grease and heat from cooking under it eventually fuck up the wood? Is it for a restaurant or some rich guy's house?

[Swift828]

Well I market to mostly schools, hospitals, doctor offices, any major business who needs cabinetry done I'll help design that. This in particular though is a job for "some rich guy's house." Its good work though, I really enjoy being able to design on the computer then build in my wife's father's shop the product that I just designed in 3D


PS- Most kitchens are made around wood, the grease will ofcourse screw up the wood, but kitchen hoods contain a vent that normally sucks up a lot of air particles that would stick, but the biggest thing is if you have grease splashing around your kitchen and on your cabinets or countertop, you would probably want to clean it anyways

[LaRoacha2]

Yea I work for a sheet metal fab company and we've made and installed ton's of kitchen hoods, and the only thing I was gonna bring up if it was for a commercial job was that by law the hood has to be UL certified and I'm sure wood won't have the necessary fire rating to meet UL specs. By law it's prolly supposed to be that way on residential install also, but with most small shit that get done in houses, nobody pulls a permit, so their is no inspection later. If the dude's house burns down later though, it could come back to haunt your Father in law.

P.S. I have seen one of our installs catch fire from grease buildup a few month's later, and if it was made of wood,,,,,,,,,the store woulda been smoked. My boss called me about a fire at a Whole Foods market that we installed a hood at and said that the belt in the exhaust fan on the roof would likely need to be replaced because they had a fire,,,,,,,,,,I got there and the fire department had used axes to get into the exhaust fan to put out the fire,,,,,,,,,,,it took a little more than a belt to fix that shit......

[Swift828]

Ya I would say your corrected about these inside a restraunt kitchen but you wouldnt be needing a kitchen hood like this anyways. But for higher end homes that have fancy solid stock type of woods used for cabinets they want a fancy cover to match. I agree though that there would be risk involved but, it would then be a good idea to keep a fireplace nearby. Im still assuming though that if you regularly cleaned the kitchen hood as you would cook then there would be no problems.