求值,sin25∏/6 cos25∏/3 tan(-4∏/3)
sin25/6pai+cos25/3pai+tan(-25/4pai)
求值sin25π/6+cos25π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-
计算:sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
sin25π/4+cos25π/3+tan(-25π/4)=
三角函数的计算题目cos25/3*π=tan(-15/4*π)
1sin3分之4π乘以6分之cos25π乘以tan-4分之3π=
sin25π/6+cos10π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)=
求sin25π/6+cos5π/3+tan(-25π/4)+sin(-7π/3)×cos(-13π/6)-sin(-5π
反函数求值tan[arcsin(-1/4)+π/3]
1.化简sin25/12πsin11/6π-cos25/12πcos11/6π的值是
a=log1/2tan70,b=log1/2sin25,c=(1/2)cos25比较abc大小
求值tan(π/6-θ)+tan(π/6+θ)+√3tan(π/6-θ)tan(π/6+θ)