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Use left endpoints and 9 rectangles to find the approximation of the area of the region between the graph of the function cos2x and the x-axis over the interval [0, pi/2] . Round your answer to four decimal places.

  • calculus -

    since the graph in the interval is symmetric about (0,pi/4) the area is zero.

    cos(2x) goes from 1 to -1 over the interval.

    However, using the specified rectangles, the approximation is 0.1745

  • calculus -

    thank you!

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