问题:
问题描述:
sin4π/3×cos25π/6×tan5π/4的值是
廖西亮回答:
1)
sin4π/3×cos25π/6×tan5π/4
=0/3*(-1)/6*0/4
=0
2)
=(sin4π/3)×cos(25π/6)×tan(5π/4)
=(-√3/2)(√3/2)(1)
=-3/4