hello , I am just going through homework answers my lecturer has written and have a question on the fourier series. when writing the values of an, a3 is negative. why is that ? and when he puts an into the equation he has turned sine to cosine. Question 2Show that the Fourier Series of the waveform in Figure 2 is6111ƒ(x) = 1 + (cos.x- cos 3x += cos 5x-—-—cos 7x +...2π3571AMA-π/2π/21Figure 2 72a-sinna- 2 [ 25²^1 11 +0] -2/2 [ Spor - Sing(3 STAATE)6 sin nuипт"(1=:: d₁азasNIE=11DIE93776STT9₂=0a4=0a6=0sinntt =0.

We use quadrant sign according to trigonometry.

Answered: Question 2 Show that the Fourier Series…

Question 2 Show that the Fourier Series of the waveform in Figure 2 is 6 1 1 ƒ(x) = 1 + (cos.x- cos 3x + -cos 5x-—-cos 7x +... 2 π 3 -π 10 -π/2 1 Figure 2 π/2 π

Algebra & Trigonometry with Analytic Geometry

13th Edition

ISBN:9781133382119

Author:Swokowski

Publisher:Swokowski

Chapter1: Fundamental Concepts Of Algebra

Section1.2: Exponents And Radicals

Problem 23E

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hello , I am just going through homework answers my lecturer has written and have a question on the fourier series. when writing the values of an, a3 is negative. why is that ? and when he puts an into the equation he has turned sine to cosine.