Consider the function f(x) = cos x - 3x + 1. Since f(0)f < 0, f(x) has a root in [0,. To solve f(x) = 0 using fixed-point method, we may consider the equivalent equation x = (1 + cos x). Let g(x) = (1 + cos x). Since [g'(0)| < 1, the fixed-point iteration xn = g(xn-1), with x = 0, will converge. What is x4? (Answer must be in 8 decimal places)

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