How Do You Solve lim(x->0) tan(3x)/sin(8x) Using Trigonometric Limits?

  • Thread starter Thread starter donjt81
  • Start date Start date
Click For Summary

Homework Help Overview

The discussion revolves around evaluating the limit of the expression lim(x->0) tan(3x)/sin(8x), focusing on trigonometric limits and the application of known limit properties.

Discussion Character

  • Exploratory, Mathematical reasoning

Approaches and Questions Raised

  • The original poster attempts to manipulate the expression using the limit property lim(x->0) sinx/x = 1, but expresses uncertainty about handling the term sin(3x)/sin(8x). Some participants suggest alternative strategies, such as multiplying by 24x or expanding the fraction.

Discussion Status

The conversation is active, with participants offering hints and alternative approaches. The original poster acknowledges the hints provided, indicating a progression in their understanding, though no consensus or final solution has been reached.

Contextual Notes

Participants are navigating the constraints of the limit as x approaches 0 and exploring different methods to simplify the expression without providing a complete solution.

donjt81
Messages
70
Reaction score
0
I'm trying to solve this problem

lim(x->0) tan(3x)/sin(8x)

using the formula lim(x->0) sinx/x = 1

so i did the following

tan(3x)/sin(8x)
{sin(3x)/cos(3x)}/sin8x
{1/cos(3x)} * {sin(3x)/sin(8x)}

now I know the term {1/cos(3x)} becomes 1 when you apply the limit but I have no idea how to solve the second term which is {sin(3x)/sin(8x)}...

can anyone please help

Thanks
 
Physics news on Phys.org
Hint: Multiply and divide by 24x. ;)
 
I'd rather expand the fraction with the factor 24x.
 
got it... thanks guys
 

Similar threads

  • · Replies 7 ·
Replies
7
Views
3K
  • · Replies 6 ·
Replies
6
Views
3K
Replies
5
Views
2K
  • · Replies 33 ·
2
Replies
33
Views
5K
  • · Replies 4 ·
Replies
4
Views
4K
Replies
1
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 4 ·
Replies
4
Views
2K
  • · Replies 1 ·
Replies
1
Views
2K
  • · Replies 24 ·
Replies
24
Views
4K