We want to calculate an approximation of cos(7/5), using polynomial interpolation through the three points x₁ = π/6, x₂ = π/4 and x3 = π/3. Calculate the three Lagrange polynomials, defined such that L(x₁) = Sik where dik is the Kronecker delta. Write your results in the form Lk(x) = ak where ak, be and C are integers. x 70 Xx + bk − + ck for k € {1,2,3}, ㅠ

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