A graphing calculator is recommended. (a) By graphing the function f(x) = Cos(2x) - cos(x) and zooming in toward the point where the graph crosses the y-axis, estimate the value of lim f( x2 x - 0 lim f(x) = X - 0 (b) Check your answer in part (a) by evaluating f(x) for values of x that approach 0. (Round your answers to six decimal places.) X f( x) 0.1 0.01 0.001 0.0001 -0.1 -0.01 -0.001 -0.0001