已知0已知0
已知0tan z/2+cot z/2=5/2.(sin² z/2+cos² z/2)/(cos z/2×sin z/2)=5/2.2/sin z=5/2sin z=4/5,cos z=3/5.sin(z-π/3)=[4×1-3×√3]/[5×2]=(4-3√3)/10
(4-3倍根号3)除以10
简单你不会自己写啊