Limit as x approaches infinity, involves sinx and cosx

  • Thread starter Thread starter rygza
  • Start date Start date
  • Tags Tags
    Infinity Limit
Click For Summary
SUMMARY

The limit of the function y = 1/2(sin x - cos x + e^(π - x)) as x approaches infinity does not exist (DNE) due to the oscillatory nature of the sine and cosine functions. As x increases, the exponential term e^(π - x) approaches zero, rendering it insignificant in the limit evaluation. Therefore, the dominant terms are sin x and cos x, which oscillate indefinitely, confirming that the limit cannot be expressed in terms of a finite value.

PREREQUISITES
  • Understanding of limits in calculus
  • Knowledge of trigonometric functions, specifically sine and cosine
  • Familiarity with exponential functions and their behavior as variables approach infinity
  • Basic grasp of oscillatory behavior in mathematical functions
NEXT STEPS
  • Study the properties of oscillatory functions in calculus
  • Learn about limits involving trigonometric functions
  • Explore the behavior of exponential decay in limits
  • Investigate advanced limit techniques, such as the Squeeze Theorem
USEFUL FOR

Students of calculus, mathematicians, and educators seeking to deepen their understanding of limits involving oscillatory functions and exponential decay.

rygza
Messages
37
Reaction score
0
y=1/2(sinx-cosx+e(^pi-x))

question: if x approaches infinity, which term or terms will dominate?
from my understanding, sinx and cosx will oscillate and the e term will approach zero. so would the answer be sinx-cosx?

please and ty
 
Physics news on Phys.org
since the e^(pi-x) term approaches 0, it has no real impact on the sin x and cos x terms. the oscillating terms mean that the limit DNE, not that the limit is sin x-cos x (answer should not be in terms of x, anyway)
 

Similar threads

Replies
3
Views
2K
Replies
9
Views
2K
  • · Replies 2 ·
Replies
2
Views
1K
  • · Replies 3 ·
Replies
3
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
Replies
7
Views
2K
  • · Replies 8 ·
Replies
8
Views
2K
  • · Replies 2 ·
Replies
2
Views
2K
  • · Replies 11 ·
Replies
11
Views
3K
  • · Replies 5 ·
Replies
5
Views
2K