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(1 point) Find the Fourier approximation to f(x) = x over the interval (-11, ] using the orthogonal set {1, sin , cos x, sin

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i fin de a ne jaz + 3 a lanteros . - f(x) dx ... (1) Ao tot jou oz ..( į su sokan ez a fames de +30. Janes sinka dz -TT Fso, Burs 1 flx) sin kr dx , k> 1 ...12) ...Likewise, H. CÓ = #ſtem) costs box, tas ..?) Also, given flX) = x, therefore,$199 & Mot in kx + į Cx bosk 2 f(x) Ait) ~ 0 + 2 sin x + (-1) sin 2x + { sin 3 z + OCOS X + OCOS 2x + O COS 3 x Rearrange, +

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