Obtain the Fourier series for 𝑓(𝑥) = |𝑥| , −𝜋 ≤ 𝑥 ≤ 𝜋

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4.a) Obtain the Fourier series for 𝑓(𝑥) = |𝑥| , −𝜋 ≤ 𝑥 ≤ 𝜋

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