sin25π/6+cos10π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)=

来源：学生作业帮编辑：作业帮分类：数学作业时间：2024/05/01 01:30:11

sin25π/6+cos10π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)
=sin(4π+ π/6）+cos(4π - 2π/3)+tan(-6π- π/4)+sin(-2π - π/3)×cos(-2π - π/6)
=sin(π/6）+cos(2π/3) + tan(-π/4) + sin(- π/3)×cos(- π/6)
=sin(π/6）-cos(π/3) - tan(π/4) - sin(π/3)×cos(π/6)
=1/2 - 1/2 - 1 - (根号3)/2 × (根号3)/2
=-1 - 3/4
=-7/4

sin25π/6+cos10π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)= 求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(- 求sin25π/6+cos5π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π 计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3) sin25π/4+cos25π/3+tan(-25π/4)= sin25π6 sin25/6pai+cos25/3pai+tan(-25/4pai) sin(-4π／3)cos(-23π/6)tan(25π/4)=? cosπ/3+tanπ/4+3tan²π/6+sinπ/2+cosπ+sin3π/2等于?. 已知tanα/2=2,1.求tan(α+π/4)的值 2.（6sinα+cosα)/（3sinα-2cosα)的值已知tanα/2=2求tan(α+π/4)的值(6sinα+cosα)/(3sinα-2cosα)的值 SIN(-7/6π）,cos（15/4π）,tan(-8/3π）,tan(33/4π)