若11π/3

若11π/3 求值:cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11) 求值：cos(π/11)-cos(2π/11)+cos(3π/11)-cos(4π/11)+cos(5π/11) cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11) 若3π/2 若3π/4 若3π/2 若3π/2 若3π/2 若3π/2 若loga(π-3) 若loga(π-3) 求值cos9π/4+tan(-11π/6)-sin9π/4+tan(--11π/3) 1.求值sin（-4/5π）cos（-5/3π）-tan（-11/6π）-（cos7/6 π×3tan4/3 π）/sin2/3 π2.若sinθ=2cosθ,求sincosθ.3.若sin（-4π+a）=1/2,求sin（2π-a）/cos（π-a） cos（π/11）cos（2π/11）cos（3π/11）cos（4π/11）cos（5π/11）怎么解 求值sin7π/3cos(-23π/6)+tan(-11π/4)cos13π/3 求cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11)求值:cos(π/11)cos(2π/11)cos(3π/11)cos(4π/11)cos(5π/11)(5/24)(11/24)=5/11?,而且过程和题好像都没关系。 求11/6π,-2/3π的三角函数值