5. Complex Exponential Function
The chapter delves into the complex exponential function, emphasizing its crucial role in modeling oscillatory phenomena in civil engineering through differential equations. Key concepts include Euler's formula, the properties of complex exponentials, their relationship with trigonometric functions, and applications in solving linear differential equations. Additionally, graphical representations and implications in signal processing and structural dynamics are discussed.
Enroll to start learning
You've not yet enrolled in this course. Please enroll for free to listen to audio lessons, classroom podcasts and take practice test.
Sections
Navigate through the learning materials and practice exercises.
What we have learnt
- Euler's formula relates complex exponentials to trigonometric functions.
- The complex exponential function is fundamental in solving differential equations in civil engineering.
- Polar form enhances the analysis and computation of complex numbers.
- De Moivre’s theorem simplifies the powers and roots of complex numbers.
Key Concepts
- -- Euler's Formula
- The equation e^(ix) = cos(x) + i*sin(x) connects complex exponentials with trigonometric functions.
- -- Complex Exponential Function
- Defines the exponential of a complex number and maps spirals in the complex plane, where the real part correspond to growth and the imaginary part corresponds to oscillation.
- -- De Moivre's Theorem
- States that (cos θ + i sin θ)^n = cos(nθ) + i sin(nθ), simplifying calculations involving powers of complex numbers.
- -- Fourier Series
- Expresses periodic functions as sums of sines, cosines, or complex exponentials, crucial for signal processing and analysis.
Additional Learning Materials
Supplementary resources to enhance your learning experience.