求函数f(x)=cox^3+sin^2-cosx_数学解答

求函数f(x)=cox^3+sin^2-cosx

人气：349 ℃　时间：2020-09-11 22:00:13

解答

=cosx(cosx^2-1)+sinx^2
=-cosxsinx+sinx^2
=sinx(sinx-cosx)
=(1/2)^1/2sinxsin(x-pi/4)