# Does my solutions correct? I someone to check.

• MHB
• duffymercy
In summary, the person is trying to solve a math problem and is having trouble with the trig functions.
duffymercy
I need someone to check my solutions if they are correct. And i need help about how to find normal equation of curve.(last picture)

#### Attachments

• çözüm konveks.jpg
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• çözüm1.jpg
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• çözüm3.jpg
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• soru temiz tanjant.jpg
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It's almost impossible to read those! Couldn't you type them in? For that matter why couldn't you check the answers yourself?

Country Boy said:
It's almost impossible to read those! Couldn't you type them in? For that matter why couldn't you check the answers yourself?
I don't know how to type them in pc, and i have bionic hand that's why i can't write good. Sorry.

Hi duffymercy, if you don't know how to type math expression/equation in $\LaTeX$, perhaps you want to check this https://mathhelpboards.com/threads/mhb-latex-guide-pdf.1142/ out. (Smile)

But, if you want to upload the picture of the math problem and your solution to the problem here so we could see if you have got a sound solution, you could help us out by uploading a picture that is visible to us, okay?(Nod)

I hope it's better
anemone said:
Hi duffymercy, if you don't know how to type math expression/equation in $\LaTeX$, perhaps you want to check this https://mathhelpboards.com/threads/mhb-latex-guide-pdf.1142/ out. (Smile)

But, if you want to upload the picture of the math problem and your solution to the problem here so we could see if you have got a sound solution, you could help us out by uploading a picture that is visible to us, okay?(Nod)
In the first picture we are looking for inflection point and concavity.
In the second picture we are looking for max volume of cone. We have hypotenuse value.

https://www.physicsforums.com/attachments/311841._xfImporthttps://www.physicsforums.com/attachments/311842._xfImporthttps://www.physicsforums.com/attachments/311843._xfImport

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Can you post the question as well because without the question, it is hard for us to know what you are trying to solve...

anemone said:
Can you post the question as well because without the question, it is hard for us to know what you are trying to solve...
In the first picture we are looking for inflection point and concavity of the curve.
In the second picture we are looking for max volume of cone that generated by right triangle rotated about one of it's legs. We have the hypotenuse value.
Third picture explains itself.

inflection point is correct, as is concavity for signs shown for $f''$

max volume is ok ... I would have used $V = \dfrac{\pi}{3}(7h-h^3)$ instead of the trig functions

inverse derivative value is correct

skeeter said:
inflection point is correct, as is concavity for signs shown for $f''$

max volume is ok ... I would have used $V = \dfrac{\pi}{3}(7h-h^3)$ instead of the trig functions

inverse derivative value is correct
Thank you so much, I learned $$\displaystyle V=(π/3)*r^2\sqrt(7−r^2)\$$ method after I post it here. But still I think trig functions was easier. This method is more complicated.

skeeter said:
inflection point is correct, as is concavity for signs shown for $f''$

max volume is ok ... I would have used $V = \dfrac{\pi}{3}(7h-h^3)$ instead of the trig functions

inverse derivative value is correct
AH LOL, I just saw what you did there, if I would've do it for h instead of r, taking derivative could be easier...
work smart ... not hard. it explains everything...

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## 1. How can I check if my solution is correct?

There are several ways to check if your solution is correct. You can double check your calculations, use a calculator or online tool, or ask someone else to review your work.

## 2. Can someone else check my solution for me?

Yes, it is always a good idea to have someone else check your solution for accuracy. Another person may be able to spot any errors or offer suggestions for improvement.

## 3. Should I use a calculator to check my solution?

Using a calculator can be a helpful tool to check your solution. However, it is important to understand the steps and concepts behind the solution rather than relying solely on a calculator.

## 4. What if I am still unsure about my solution even after checking it?

If you are still unsure about your solution, you can ask for a second opinion from another person or consult with a teacher or tutor for clarification.

## 5. Is there a specific format or method for checking a solution?

There is no one specific format or method for checking a solution. It is important to understand the problem and use the appropriate steps and calculations to arrive at the correct solution.

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