根号3×cosπ/12-sinπ/12=?
根号3×cosπ/12-sinπ/12=?
求sin π/12-(根号3)cos π/12
cosπ/12+(根号3)×sinπ/12的值
cosπ/6+根号3sinπ/6=?
已知cos(π\3-2)=1\3,则cosα+根号3sinα=
根号3 sinπ/12+cosπ/12的值是多少
sin(π/12)-根号3倍cos(π/12)的值
已知sin(阿尔法+π/3)=a,那么根号3sin阿尔法-cos阿尔法的值
求证 cos(A)+ 根号3sin(A)=2sin(π/6+A)
cos(π/2-α)=根号2cos(3/2π+β),根号3sin(3π/2-α)=-根号2sin(π/2+β)且0
已知sin(3π-α)=根号2*sin(π-β),根号3*cos(-α)=-根号2*cos(π+β),且α、β∈(0,π
已知sin(3π-a)= 根号2sin(π-β),根号3cos(-a)= -根号2cos(π+β),且α β属于(0,π