求sin25π/6+cos25π/3+tan(-25π/4)的值?

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求sin25π/6+cos25π/3+tan(-25π/4)的值?求sin25π/6+cos25π/3+tan(-25π/4)的值?求sin25π/6+cos25π/3+tan(-25π/4)的值?2

求sin25π/6+cos25π/3+tan(-25π/4)的值?
求sin25π/6+cos25π/3+tan(-25π/4)的值?

求sin25π/6+cos25π/3+tan(-25π/4)的值?
25π/6=4π+ π/6 25π/3=8π+π/3 25π/4=6π+π/4 sinπ/6+cosπ/3+tan(-π/4)=sinπ/6 +cosπ/3+tan(-π/4)=1/2+1/2+(-1)=0