Questioning the Limit of Sin x/|x| as x Approaches 0

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SUMMARY

The limit of Sin x/|x| as x approaches 0 exists and is equal to 1. This conclusion is reached by evaluating the limit from both sides of 0, specifically by analyzing the behavior of the function as x approaches 0 from the positive and negative directions. The approach involves substituting small values, such as 0.001 and -0.001, to confirm that both limits converge to the same value. The critical requirement for the limit's existence is satisfied as both one-sided limits yield identical results.

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xargon
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Hello all,

I have a question that got me stumped.

lim Sin x/|x|
x->0

The above limit. Does it exist or not? If yes why, and if no why not.

Any help would be greatly appreciated :-)

Thanks,
Xargon
 
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Have you tried anything?

Often a good approach when dealing with absolute values is to break the problem into two parts: one where the inside is positive and one where it is negative.
 
Remember that one of the requirements for a limit to exist is the limit must be the same from both sides.

Since 0/0 is undefined, you'll want to try x plus or minus some very small amount.

For example, try .001 for x to determine the limit from the right. Then try -.001 to determine the limit from the left. See if they match up.
 

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