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# got a formula that i cant get the answer for.....

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3.04-(0.3/2tanB) where B=30%

It is a formula on an engineering drawing we have been sent. (for information)

Guest Oct 17, 2017
edited by Guest  Oct 17, 2017
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#1
+78618
+2

I believe you must mean "30° "  rather than "30%"

So we have

3.04 -  [ (.3/2) * tan (30°) ]  =

3,04 - [ .15 * (1 / √3 ) ]  =

3.04  -  [ .15 √3 / 3  ] =

3.04  -  .05 √3  ≈  2.9534

CPhill  Oct 17, 2017
#2
+1

Thank you.

Yes it is degree, not percent

We get an answer sililar to that, but it makes no sense on the drawing we have been sent.

We just needed to make sure we weren't missing something.

Thank you very much. (I think this site might be a good find.....i'll bookmark it straight away )

Glenn

Guest Oct 17, 2017
#3
+78618
+1

I wonder if it's supposed to be

3.04 -  [ .3 /  (2 * tan (30°) ) ]    =   2.78

CPhill  Oct 17, 2017
edited by CPhill  Oct 17, 2017
#4
+1

It's one of those technical drawings that is WAAYYYYY over spec'd, with tolerances that are also way over spec'd