作业帮计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
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计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
原式=sin(4π+π/6)+cos(6π+π/4)-tan(6π+π/4)-sin(8π+2π/3)
=sinπ/6+cosπ/4-tanπ/4-sin2π/3
=1/2+√2/2-1-√3/2
=（√2-√3-1）/2
=sinπ/6+cosπ/4+tan(-π/4)+sin(-2π/3)
剩下的就是基础的计算了，根号不好打出来的，自己写个结果就行了
计算：sin25π/6+cos25π/4+tan(-25π/4)+sin(-26π/3)
计算,sin25π/6+cos25π/3+tan(-25π/4)
sin25π/6+cos25π/3+tan(-25π/4)
先估计结果的符号,再进行计算sin25π/6+cos25π/3+tan（- 25π/4）
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