Finding the Intersection of Graphs for Homework Equation

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SUMMARY

The discussion centers on finding the intersection of the equation 1 = |(sin(x) - x) / sin(x)| * 100 graphically. The user graphed y = 0.01 and y = |1 - (x/sin(x))|, determining that the intersection occurs at approximately x = 0.244 radians. The user expressed uncertainty about the correctness of this solution due to potential manipulations of the equation that could alter the intersection point. The Mathematica function "FindRoot" confirmed the intersection at x ≈ 0.244097, validating the graphical approach.

PREREQUISITES
  • Understanding of trigonometric functions, specifically sine.
  • Familiarity with absolute value equations.
  • Basic knowledge of graphing techniques and intersection points.
  • Experience with Mathematica for numerical solutions.
NEXT STEPS
  • Explore advanced graphing techniques using tools like Desmos or GeoGebra.
  • Learn about numerical methods for solving equations, focusing on the Newton-Raphson method.
  • Study the properties of absolute value functions in calculus.
  • Investigate the use of Mathematica for symbolic and numerical computations.
USEFUL FOR

Students in mathematics, particularly those studying calculus or trigonometry, as well as educators seeking to enhance their teaching methods for graphing and solving equations.

MrXow
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Homework Statement


1 = absolute value( (sin(x)-x)/(sin(x))) * 100


Homework Equations


Don't think there are any.


The Attempt at a Solution


I decided to do it graphically, so i graphed y=.01 and y= absolute value(1-(x/sin(x))
I got x = .244 radians for the intersection and I am just not sure if it is correct because i can manipulate the equation so that they never intersect or I can manipulate it so the point changes.
 
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Be more specific. How did you manipulate the equation?
 
MrXow said:

Homework Statement


1 = absolute value( (sin(x)-x)/(sin(x))) * 100


Homework Equations


Don't think there are any.


The Attempt at a Solution


I decided to do it graphically, so i graphed y=.01 and y= absolute value(1-(x/sin(x))
I got x = .244 radians for the intersection and I am just not sure if it is correct because i can manipulate the equation so that they never intersect or I can manipulate it so the point changes.

In order to see the problem better..

1= |(\frac{\sin(x)-x}{\sin(x)})(100)|
 
ya that's it I don't know how to do that fancy typing stuff
 
when i put it in mathematica
"FindRoot[1 == Abs[((Sin[x] - x)/Sin[x])]*100, {x, 0.1}]"
i get
{x -> 0.244097}
which makes sense
 
So, what is your question?
 

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