Textbook Problem

u -Substitution In Exercises 105 and 106, rewrite the improper integral as a proper integral using the given u -substitution. Then use the Trapezoidal Rule with n = 5 to approximate the integral.

${\displaystyle {\int }_0^1\frac{\cos x}{\sqrt{1-x}}}dx,u=\sqrt{1-x}$