The maclaurin series expansion for cos x is x2 x4 8 6+8! " starting with the simplest version, cos x = 1, add terms one at a time to estimate cos(7/4). after each new term is added cosx = - + compute the true and approximate percent relative errors. use your pocket calculator or matlab to determine the true value. add terms until the absolute value of the approx- imate error estimate falls below an error criterion conform- ing to two significant figures.

Need now max recorded the heights of 500 male humans. he found that the heights were normally distributed around a mean of 177 centimeters. which statements about max’s data must be true? a) the median of max’s data is 250 b) more than half of the data points max recorded were 177 centimeters. c) a data point chosen at random is as likely to be above the mean as it is to be below the mean. d) every height within three standard deviations of the mean is equally likely to be chosen if a data point is selected at random.