# calculating

1. ### Euclidean Circle Geometry. Calculating the Radius

In the diagram below, DE is a chord of the circle that goes through c,d and e. A is the center of the circle. The perpendicular line from centre A intersects DE at B and the circle at C, DE=100cm BC= 10cm AB=X I need to calculate the length of AB / x. Basically i need to calculate the...

Hi All, I have a question that I would like to think is easy. I have an ellipse with a known circumference and 1 radius. I want to calculate the other radius. I am just wondering if there's an easy way to do this. I know the equation circumference = (pi/2)sqrt(2A2 + 2B2) is not as accurate...
3. ### Calculating the height of a circle segment

Hey guys, I'm helping my father with some calculations for building a steam engine. I need to calculate the height of a circle segment i know the area of and also knowing the radius. I got as far as finding the following formula: Area of segment = (((Ɵ/360) * π – (sin(Ɵ)/2)) x r² I understand...
4. ### calculating volume using double or triple integral

which is correct ? i have 2 notes below . Which way is correct ?
5. ### Calculating maximum and minimum points of a cubic WITHOUT calculus

Hi everyone I wanted to ask a question about calculating maximum and minimum points. I understand it is the easiest way of calculating maximum and minimum points using differentiation. But what I wanted to ask was is it possible to calculate the maximum and minimum points of a cubic function...
6. ### Calculating probability of winning a "Must Win" contest

Consider a lottery game, where I need to choose $k$ numbers out of $n$ ($k < n$), and later a random uniform-distribution machine draws $k$ numbers. The probability to win this game is $\binom{n}{k}$. But now consider this: suppose that I am not the only participant in the game, and the game is...
7. ### Calculating Games Back

Hi, this might require someone with a little knowledge of sports. I know what the Games Behind Formula is. If a team is 20-4 and another is 18-7, then you subtract 18 from 20 and get 2 and you subtract 4 from 7 and get 3. 2 +3 = 5. 5/2 is 2.5. Team B is 2.5 games back of Team A. Simple...
8. ### Optimising Area of a Triangle Given info 2 sides are equal et al - Calculating Maximu

Hi, I have a triangle with a perimeter of 3 (being each of the sides added). Two sides (lets say x) are the same length and I have to find the length of the third side (say z) that would optimise the area. Step 1: So: 2x + z = 3 z= 3-2x Now have z in term of x. Step 2...
9. ### calculating percent greater

Please see the attachment. The answer is (1/26) / (5/26). In a sense this makes sense, but what is the difference between this value and simply subtracting to get 1/26 ?
10. ### finding derivatives when calculating taylor polynomial

Hi to calculate the taylor polynomial at T3(x) at 1 for f(x) =\frac{1}{x+2} I am having trouble finding the 3rd derivative. Dealing with a rational function so we use the quotient rule, 1st derivative =\frac{0.(x+2)-1(1)}{(x+2)^2}= \frac{-1}{(x+2)^2)} 2nd derivative (this is where I have seem...
11. ### Calculating Percentage of Slope

I am looking for a formula to determine percentage of slope of a hill. For example If I stretch a string for a horizontal distance of 10 feet And the vertical drop is 5 feet at the end of the string What percentage slope do I end up with? Can someone provide the formula to calculate this?

17. ### Formula for calculating distance of holes in wooden board

Hi to you all, I have a task with calculating the distance of holes in a wooden board that is cut in an angle. Which formula do I need to use? I know the present distance of the holes when the wooden board is facing each other. But when I cut IE. 22.5° on each board - then the holes will have...
18. ### Calculating gas expense evenly

Good morning. A group of us are headed to the Appalachian Mountains on a motorcycle trip. We will be towing our bikes there and want to share the gas expense to and from the destination evenly among all members. 1. 3 vehicles going. 1 truck towing the trailer with the motorcycles and 2 cars...
19. ### Calculating payment to principal

Hi all, may I know is there any alternative way to calculate the payment to principal, beside subtracting the payment to interest from the monthly payment? thanks
20. ### Calculating limits with sincx

Hello, i have posted my calculations below i just need to know how to do the last part please to get sin(x)/x= cos(x/2)cos (x/2^2)...........cos(x/2^n) as n goes to infinity 2^n does as well so x goes to zero, i just need help with finishing off as shown below, much appreciated if i could get...