Can Dividing by Sin x Help Prove Continuity at x = 0?

In summary, a function is considered continuous at a point if its limit at that point exists and is equal to the value of the function at that point. To determine if a function is continuous at x = 0, you can check if the function is defined, if the limit exists and is equal from both sides, and if the value at x = 0 is equal to the limit. If a function is not continuous at x = 0, it can lead to unexpected or undefined behavior. A function can be continuous at x = 0 but not at other points, and some real-life examples of continuous functions at x = 0 include the height of an object dropped from a certain height, the temperature of a cooling cup of coffee
  • #1
Joe20
53
1
Not sure how to do this question. Help needed. Thanks
 

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  • #2
Another hint:
Use the well-known result $\displaystyle\lim_{x\to0}\frac{\sin x}x=1$.
 
  • #3
Olinguito said:
Another hint:
Use the well-known result $\displaystyle\lim_{x\to0}\frac{\sin x}x=1$.

Given the hint that comes with the problem, I wouldn't think that would be appropriate. Alternatively one might suggest dividing everything by $\sin x$, which seems more in line with the hint.
 

What is the definition of "Proof Continuous at x = 0"?

The concept of "Proof Continuous at x = 0" refers to a mathematical property of a function where the value of the function at x = 0 is equal to the limit of the function as x approaches 0 from both the left and right sides.

How do you prove continuity at x = 0?

To prove continuity at x = 0, you must show that the left and right limits of the function at x = 0 are equal and that the function is defined at x = 0. This can be done using various methods such as the epsilon-delta definition, the intermediate value theorem, or the continuity of composite functions.

Why is continuity at x = 0 an important concept in mathematics?

Continuity at x = 0 is important because it allows us to understand and analyze the behavior of a function at a specific point. It also helps us identify any potential discontinuities in a function, which can have significant implications in various fields of mathematics and science.

What happens if a function is not continuous at x = 0?

If a function is not continuous at x = 0, it means that the left and right limits of the function at x = 0 are not equal. This can result in a discontinuity at x = 0, which can lead to unexpected or undefined behavior of the function at that point.

Can a function be continuous at x = 0 but not at other points?

Yes, it is possible for a function to be continuous at x = 0 but not at other points. This means that the function satisfies the definition of continuity at x = 0, but it may have discontinuities at other points. This highlights the importance of considering continuity at specific points rather than assuming continuity for the entire function.

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