sin25π/4+cos25π/3+tan(-25π/4)=

来源:学生作业帮助网 编辑:作业帮 时间:2024/11/03 05:31:41
sin25π/4+cos25π/3+tan(-25π/4)=
x)+32=ߠo_ fk$iBD5mmP_`gCiO?oTavA,ҡakBt%u`m@0Atj@|䣎YFFچF ~qAbԑ6`=s̃؉d߳;o~O!션 Ԋ$kbH~Y

sin25π/4+cos25π/3+tan(-25π/4)=
sin25π/4+cos25π/3+tan(-25π/4)=

sin25π/4+cos25π/3+tan(-25π/4)=
原式= sin(6π+π/4)+cos(8π+π/3)+tan(-6π-π/4)
=sinπ/4+cosπ/3-tanπ/4
=√2/2+1/2-1
=(√2-1)/2

=sinπ/4+cosπ/3+tan(-π/4)
=根号2/2+1/2-1
=根号2/2-1/2