Approximate the area of the region bounded by the graph of f(t) = cos (t/2-3/4) and the t-axis on [x/2,3x/2] with n = 4 subintervals. Use the midpoint of each subinterval to determine the height of each rectangle (see figure). The approximate area of the region is (Round to two decimal places as needed) 0.5- f(t) = cos(t/2-3/4) KIN a Зл 2x 2 Q

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