How can i tell a period of a function involving sin and cos

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SUMMARY

The period of the function sin(2t) + 3cos(5t) is determined by analyzing the individual periods of the sine and cosine components. The period of sin(2t) is π, while the period of cos(5t) is 0.4π. The least common multiple of these two periods is 2π, which establishes the overall period of the combined function as 2π.

PREREQUISITES
  • Understanding of trigonometric functions, specifically sine and cosine.
  • Knowledge of Fourier Analysis concepts.
  • Familiarity with calculating periods of periodic functions.
  • Basic algebra skills for manipulating equations.
NEXT STEPS
  • Study the properties of periodic functions in trigonometry.
  • Learn about the Least Common Multiple (LCM) and its application in finding periods.
  • Explore Fourier Series and their applications in signal processing.
  • Investigate the effects of phase shifts on the periods of trigonometric functions.
USEFUL FOR

Students studying Fourier Analysis, mathematicians, and engineers working with periodic functions in circuits and signal processing.

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Ok so we started Fourier Analysis in circuits. How can i tell the Period of a function that's let's say sin(2t)+3cos(5t) something like that . Any help or url's that have information on this
 
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For your example, the period of sin(2t) is pi and the period of cos(5t) is 0.4pi. The smallest interval that is a multiple of both pi and 0.4 pi is 2pi, so that would be the period of the sum of the two functions.
 

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