2. Lagrange Approximation

Solution. Using (2.1) with the abscissas x0 = 0.0, x1 = 1.2 and the ordinates y0 = cos(0.0) =1.000000, y1 =cos(1.2) = 0.362358 produces

= -0.833333(x - 1.2) + 0.301965(x - 0.0)

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