化简求值:sin(π/4-3x)*cos(π/3-3x)-cos(π/6+3x)*sin(π/4+3x)

化简求值:sin(π/4-3x)*cos(π/3-3x)-cos(π/6+3x)*sin(π/4+3x) 求值化简：sinα*cosα 求值:sin(26π/3)+cos(-17π/4)= 求值：(1-sin^6 x-cos^6 x)/(1-sin^4 x-cos^4 x) 求值化简：sin^3α+cos^4α题打错了，加号后面的是cos^3α sin(x+π/6)=1/2,则cos(π/3-x)求值 求值sin(x-45)+cos(45+x) 化简求值 sin(x+3分之派）+2sin（x-3分之派）-根3cos（3分之2派 -x） 高中三角函数化简求值化简：√2-sin^2+cos4 （根号下） cos(π/9)*cos(2π/9)*cos(3π/9)*cos(4π/9） 化简求值sin^4θ+sin^4(π/3-θ)+sin^4(π/3+θ) sin^4θ+sin^4(π/3-θ)+sin^4(π/3+θ)化简求值 【三角恒等变换】cos(33°-x)sin(63°-x)-cos(x+57°)sin(27°+x)化简并求值 求值sin²x+cos²(π/6+x)+1/2sin(2x+π/6) 化简求值cos190*sin(-210)/cos(-350)*tan(-585) 求值： 2(sin^6 θ+cos^6 θ)-3(sin^4 θ+cos^4 θ) 已知π/4＜x＜π/2,sinx-cosx=1/5,求值：(1)sinx+cosx；(2)3sin^2x+cos^2x-4sinxcosx 怎样化简函数 cosπ/4cosπ/3-sinπ/4sinπ/3cosπ/4cosπ/3-sinπ/4sinπ/3 求值:sin(-31π/6)-cos(-10π/3)-sin11π/4