1.比较大小 1）sin(-5π/7)与cos11π/91）sin(-5π/7)与cos11π/92) x=lnπ,y=log以3_数学解答

1.比较大小 1）sin(-5π/7)与cos11π/9
1）sin(-5π/7)与cos11π/9
2) x=lnπ,y=log以3为底2的对数
z=e^-1/2

人气：249 ℃　时间：2020-05-13 12:53:21

解答

1)cos(11π/9)>sin(-5π/7)
2)x>y>z