1. The measurement of a side of a square is found to be 20 centimeters, with a possible error of 0.02 centimeter.
(a) Approximate the percent error in computing the area of the square.
(b) Estimate the maximum allowable percent error in measuring the side if the error in computing the area cannot exceed 2.7%.
2.Find the differential dy of the given function. (Use "dx" for dx.) y=1/2 cos (2πx-1/2)