Evaluate Product: Limit of Product Involving Tangents

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In summary, the limit of a product involving tangents refers to the value that a function approaches as the input approaches a specific value, and can be calculated using the limit laws. Evaluating this limit is significant as it helps us understand the behavior of a function and has real-world applications in various fields.
  • #1
lfdahl
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Evaluate the product:

\[\lim_{n\to \infty}\prod_{k=1}^{n}\left(1+\tan \left(\frac{1}{n+k}\right)\right), \;\;\; n,k \in \Bbb{N}.\]
 
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  • #2
Hint:

\[\lim_{x \rightarrow 0}\frac{\tan x}{x} = 1\]
 
  • #3
Suggested solution:
Let the limit be $L$.We have:

\[\lim_{n\rightarrow \infty }\frac{\tan\left ( \frac{1}{n+k} \right )}{\frac{1}{n+k}} =\lim_{n\rightarrow \infty }(n+k)\tan\left ( \frac{1}{n+k} \right ) = 1,\;\;\; 1 \le k \le n.\]

Hence:

\[L = \lim_{n \rightarrow \infty }\prod_{k=1}^{n}\left ( 1+ \frac{1}{n+k}\right ) = \lim_{n\rightarrow \infty } \frac{2n+1}{n+1} =2.\]
 

Related to Evaluate Product: Limit of Product Involving Tangents

1. What is the meaning of a limit of a product involving tangents?

The limit of a product involving tangents refers to the value that a function approaches as the input approaches a specific value, where the function is the product of two or more functions involving tangents.

2. How is the limit of a product involving tangents calculated?

The limit of a product involving tangents can be calculated using the limit laws, which state that the limit of a product is equal to the product of the limits of each individual function. In other words, the limit of a product involving tangents can be found by taking the limit of each tangent function and then multiplying them together.

3. What is the significance of evaluating the limit of a product involving tangents?

Evaluating the limit of a product involving tangents is important because it allows us to determine the behavior of a function near a specific value. It helps us understand the relationship between the tangent functions and how they affect the overall product function.

4. What are some common examples of limits of products involving tangents?

Examples of limits of products involving tangents include calculating the slope of a tangent line to a curve, finding the instantaneous rate of change of a function, and determining the concavity of a curve at a given point.

5. How can the limit of a product involving tangents be used in real-world applications?

The limit of a product involving tangents has many practical applications in fields such as physics, engineering, and economics. It is used to model and analyze various phenomena, such as the motion of objects, the growth of populations, and the behavior of markets.

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