Math Problem Statement

What is the limit of (sin(10x)/x) as x approaches 0?

Solution

The given limit is:

limx0sin(10x)x\lim_{{x \to 0}} \frac{{\sin(10x)}}{x}

To solve this, we can use a well-known limit result:

limx0sin(kx)x=k\lim_{{x \to 0}} \frac{{\sin(kx)}}{x} = k

Here, k=10k = 10. Therefore:

limx0sin(10x)x=10\lim_{{x \to 0}} \frac{{\sin(10x)}}{x} = 10

The limit evaluates to 1010.

Would you like more details on the steps or have any other questions?

Here are some related questions:

  1. How does this formula for the limit sin(kx)x\frac{\sin(kx)}{x} derive from the small-angle approximation?
  2. Can this technique be applied to other trigonometric functions?
  3. What happens if we change sin(10x)\sin(10x) to cos(10x)\cos(10x)?
  4. What if we approach this using L'Hôpital's Rule?
  5. How can this limit help us understand the derivative of the sine function?

Tip: Memorizing the standard limit limx0sin(x)x=1\lim_{{x \to 0}} \frac{\sin(x)}{x} = 1 can simplify many trigonometric limit problems.

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Math Problem Analysis

Mathematical Concepts

Limits
Trigonometry

Formulas

lim (x -> 0) (sin(kx)/x) = k

Theorems

Sine limit theorem
Small-angle approximation

Suitable Grade Level

Grades 10-12