You stand a known distance from the base of the tree, measure the angle of elevation the top of the tree to be 15°, and then compute the height of the tree above eye level. Use the appropriate linear approximation to estimate the maximum possible error in your measurement of the angle (measuered in degrees) to be sure that your computation of the height has a relative error of at most Ep%. Give an exact answer, simplified as much as possible. Do not use a calculator.
