Math question.

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I have a right triangle with angles of 90 degrees, 31 degrees and 59 degrees. I know the length of one side, the longer side of the right angle, it is 0.086". How can I find the length of the other side of the right angle?City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:http://www.mathsisfun.com/pythagoras.html
Reply:It can be done with basic trig functions.Tan of an angle= opposite length / Adjacent length.Sine of an angle= opposite length / Hypotenuse.Cosine of an angle= Adjacent length / Hypotenuse.So if the angle is 31deg, the adj side is the long one at 0.086tan59= unknown length / 0.0860.086* tan 59 = Unknown length.I can't find my trig calculator right now or I would do the math for you.As long as you know the angle and one length you can find any of the others on a right triangle.Hope this helps.
Reply:0.05167A good guess is better than a bad measurement
Reply:I knew I would end up with a headache!

I found .051 after googling this up...http://www.mathopenref.com/righttriangle.html...I knew there is a formula of some trigometric sort, but not which or how to use it.Where is that "Bang Head Here" sign?Thanks for the clues, for sure!!

City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:2   2  2A+B=C(longest side of triangle)
Reply:

Originally Posted by Magnetic_re

2   2  2A+B=C(longest side of triangle)
Reply:http://i176.photobucket.com/albums/w...r/P4270011.jpgHere is the drawing with the problem and the answer that I wrote in. Then I found the trig functions explained well enough in the "Machinery's Handbook", page 91 of the 27th edition, so that I could punch the numbers into my scientific calculator. I never took triggernometry!

City of L.A. Structural; Manual & Semi-Automatic;"Surely there is a mine for silver, and a place where gold is refined. Iron is taken from the earth, and copper is smelted from ore."Job 28:1,2Lincoln, Miller, Victor & ISV BibleDanny
Reply:Queen SohCahToa  

MM350P/Python/Q300MM175/Q300DialarcHFHTP MIG200PowCon300SMHypertherm380ThermalArc185Purox oaF350CrewCab4x4LoadNGo utilitybedBobcat250XMT304/Optima/SpoolmaticSuitcase12RC/Q300Suitcase8RC/Q400Passport/Q300Smith op
Reply:

Originally Posted by tanglediver

I have a right triangle with angles of 90 degrees, 31 degrees and 59 degrees. I know the length of one side, the longer side of the right angle, it is 0.086". How can I find the length of the other side of the right angle?
Reply:Here's a real simple and easy way to figure out your math problem with out a lot of math involved. DaveThis was done real quick on scrap paper as an example, to make it work you must use a ruler and protractor!

Attached Images

Last edited by dabar39; 05-02-2008 at 12:06 AM.I am what I am, Deal with it!If necessity is the Mother of Invention, I must be the Father of Desperation!
Reply:

Originally Posted by William McCormick Jr

What angle is using the known side as one ray from its vertex?       Sincerely,             William McCormick
Reply:

Originally Posted by dabar39

Here's a real simple and easy way to figure out your math problem with out a lot of math involved. DaveThis was done real quick on scrap paper as an example, to make it work you must use a ruler and protractor!
Reply:

Originally Posted by tanglediver

Dude, when was the last time you took an I.Q. test? That is sheer genius!




Reply:

Originally Posted by Brett

Two are William,The 90° and the 31°
Reply:

Originally Posted by Brett

Two are William,The 90° and the 31°
Reply:Two ways to do it using tangent function...if I am understanding your question correctly


Reply:

Originally Posted by Tinbasher

Two ways to do it using tangent function...if I am understanding your question correctly


Reply:

Originally Posted by tanglediver

0.052 is correct! William, I used a formula from that same list along with my calculator also. Once the data was input correctly, I got an answer that made sense.
Reply:

Originally Posted by Magnetic_re

2   2  2A+B=C(longest side of triangle)
Reply:Here are a few of the Alt/Numbers combo keys here. Sometimes there are other combinations that will do the same things. Even just three digits.Depends on which text type and bla bla yadda yadda.Play around with them.Hold the Alt key and hit these numbers on the Nums key pad for these;0178 = ² squared0179 = ³ cubed0247 = ÷ divided by0215 = × multiply by0176 = ° degree, also 167, 2480162 = ¢ cents, also 155
Reply:¼ ( 172 )½ ( 171 )¾ ( 0190 )° ( 248 )² ( 253 )√ ( 251 )± ( 241 )≥ ( 242 )≤  ( 243 )+ ( 43 )☺ ☻ ♥ ♦ ♣ ♠ • ◘ ~ ◙ ♂ ♀ ♪ ♫ ☼ ► ◄ ↕ ‼ ¶   LOL.. sorry  I got carried away...  I used to send alt messages to people as a coded messages...  I won't get into all of that but I have used them way too much..  and a lot of them repeat several times... the only difference is how many numbers you have to put in...
Reply:

Originally Posted by Donald Branscom

Then devide by 2 to get the awnswer.
Reply:WOW....that sure went off on a tangent.......( i'm sorry, really, i am)
Reply:The way I learned trigonometry in electronics school was to remember these relationships:Square of the length of side A plus the square of the length of side B equals the square of the length of side C.   This editor does not support superscript so I will post an image:

Next, a phoney Indian word:Soh Cah Toa  (say it like this:  So  C-ahhh Toe-a) Sine = length of side Opposite the angle divided by length of the HypotenuseCosine = length of the side Adjacent to the angle divided by the length of the HypotenuseTangent = length of the side Opposite the angle divided by the length of the side Adjacent to the angle.If you have any two values of either of the above items you can calculate all the others.We needed to learn this to calculate things like RMS voltage and energy in AC circuits, and other esoteric things like plotting the load line of a Class A transistor amplifier.  But the same formulae are handy for any carpenter, fabricator, or just about any other tradesman.Member, AWSLincoln ProMIG 140Lincoln AC TombstoneCraftsman Lathe 12 x 24 c1935Atlas MFC Horizontal MillCraftsman Commercial Lathe 12 x 36 c1970- - - I'll just keep on keepin' on.The length of the right angle (or hypotenuse) can be determined using a simple formula: The length of the hypotenuse of a right triangle is 1/2 the sum of the lengths of the two sides of the triangle. This formula is the same regardless of which of the two sides of the triangle is the longest. For example, if the sides of a right triangle are 4 inches and 6 inches, then the length of the hypotenuse is 2 inches.Neal Dennis
Reply:Genius revealed. You didn't do so well at kindergarten maths did you?You know that spammers seem to wanna dig up old posts.
Reply:

Originally Posted by NealDennis

The length of the right angle (or hypotenuse) can be determined using a simple formula: The length of the hypotenuse of a right triangle is 1/2 the sum of the lengths of the two sides of the triangle. This formula is the same regardless of which of the two sides of the triangle is the longest. For example, if the sides of a right triangle are 4 inches and 6 inches, then the length of the hypotenuse is 2 inches.
Reply:

Originally Posted by Woznme

Genius revealed. You didn't do so well at kindergarten maths did you?You know that spammers seem to wanna dig up old posts.
Reply:Use how do in construction. 5 , 4 ,3 for a right angle Simple on side is 4 foot the other side is 3 foot the angle side is 5 foot. Do not double like 10, 8 , 6 it does not work.Dave

Originally Posted by tanglediver

I have a right triangle with angles of 90 degrees, 31 degrees and 59 degrees. I know the length of one side, the longer side of the right angle, it is 0.086". How can I find the length of the other side of the right angle?
Reply:

Originally Posted by smithdoor

Use how do in construction. 5 , 4 ,3 for a right angle Simple on side is 4 foot the other side is 3 foot the angle side is 5 foot. Do not double like 10, 8 , 6 it does not work.Dave