Char C.

asked • 03/08/15

frustration beyond believe

Matt H.,
Thank you for your response to Eric. You were very professional in responding to his reply, better than I would have been. There are always answers to questions whether right or wrong. I've never had algebra, geometry let alone trigonometry and his remarks are frustrating to an individual who is already beyond the point of frustration. All I want to know if someone can in black and white explain the steps in achieving the answer to these questions, not just words but the process in reaching them. Again an example is calculate the angle of impact for a stain 6.9mm in width/13.6mm length. Then using the tan function tan I = H/D to determine the height of origin in inches (Distance: 22 inches). That's all that is being asked - can you help!
 
Frustrated!

Matt H.

Hi Char--
 
I wish I could help with the actual questions--they actually sound pretty interesting. But the math and science of it are definitely beyond me. Do you have a textbook or other sources that you're working from, and/or a professor you could ask for guidance?
 
Thanks for your nice note, though. I'm sorry you're having a tough time getting help on these. If I think of any possible sources, I will let you know.
 
All best,
 
Matt in NY
 
 
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03/08/15

Mark M.

"calculate the angle of impact for a stain 6.9mm in width/13.6mm length."
Do you have, if one exists, a formula for making this calculation?
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03/08/15

Mark M.

The following is a copy of a previous posting:
 
got a question
Step 1 - calculate the angle of impact in degrees of a stain where the width is 7mm and the length is 9.9 mm
Step 2 - Determine the height of origin in inches using the tangent equation where the distance from point of convergence is 37.5 inches from the information achieved in step 1.
yesterday | Sherry from Turlock, CA | 0 Answers | 0 Votes
 
Do you recognize how either your question of that of Sherry are suspect?
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03/08/15

Char C.

That is a friend of mine and I asked her to put one through to see if she would get a formula for doing this because I was getting those continuous comments from Eric. So now I have a saying I use "stick a fork in me I'm done". I am so frustrated and cannot think anymore on this. I have researched for formulas on this particular subject with no help and learning algebra when going for my BS and learning something new each week in that subject did not help especially when you have never had that subject in your whole life. Anyway thanks for trying to help, but I'm DONE!
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03/08/15

Arthur D.

tutor
google angle of impact and you will find the following formula: sin(∠)=width/length
now use arcsin to find the angle; use arcsin on your calculator or google it
tan l=H/D is in your question
does H stand for height and does D stand for distance ?
if so, what does l stand for ? is it the angle found by using the arcsin ?
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03/08/15

Char C.

for tan I = H/D the textbook shows this and than H = I x D
so the example reads if:
I (impact of angle) = 35 degrees
D(distance from point of origin) = 30
Tan 35 = 0.700 (how did they get this answer)
Than it shows H = 0.700 x 30 (the distance) = 21 inches (height) how do they get to this
 
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03/08/15

Arthur D.

tutor
tan(35º)=0.70020753821 from a website or from a table of tangent values, but a table won't give you as many digits, only about 4 or 5 digits; 0.70020753821 is just rounded off to 0.700
tan(35º)=H/D
0.700=H/30
multiply both sides by 30
(30)(0.700)=(30)(H/30)
21=H (30*0.700=21 and the 30s cancel each other out on the right side)
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03/08/15

1 Expert Answer

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Arthur D. answered • 03/08/15

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I made a comment but it did not post, so I'll explain it here.
tan(35º)=0.70020753821
I got this from a website but you can get about 4 or 5 digits from a table of tangent values, or you can just google
tan(35º). (0.70020753821 was just rounded off to 0.700)
tan(35º)=H/D
0.700=H/30
multiply both sides by 30
30*(0.700)=30*(H/30)
21=H
30*0.700=21 (do it out on paper to see this) and...
30*(H/30)=H because the 30s cancel each other out; one operation(multiplication) undoes the other(division)
 
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