计算sin25/6π+tan9/4π-cos19/3π
sin25π6
tan9π/8
计算:sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-
sin25π/6+cos10π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)=
sin25π/4+cos25π/3+tan(-25π/4)=
求下列各角三角函数值或三角函数式的值 ①sin240度②tan(-17/6π)③cos19/6π+tan16/3π
求sin25π/6+cos5π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π
sin25/6pai+cos25/3pai+tan(-25/4pai)
比较下列各组数的大小(1)tan2π/5与tan3π/5(2)tan2与tan9(3)log1/2tan70°与log1
1.化简sin25/12πsin11/6π-cos25/12πcos11/6π的值是
计算tan1*tan2*tan3*tan4*tan5*tan6*tan7*tan8*tan9*tan10一直乘到tan8