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化简下列个比 化简下列psinx+qcosπ/2+ktan2π-p²tan135°+q²sin90°-2pqcos0°a²tanπ/4-b²sin3π/2+adcosπ-abtan5π/4mtanπ+ncosπ/2-psinπ-qcos3π/2-rsin2π 化简：❶sin（2a+b）/sina-2cos(a+b)=sinb/sina ❷cos4a+4cos2a+3=8cos⁴a sin(2A+B)/sinA-cos(A+B)=2,求sin^2(B)+2cos(2A) 已知0° 求值sinA+sin(120+A)-sin(120-A) 3/4=sin(120-A)sinA能把A解出来吗? sinA+sin(120-A)=3/2 求A度数 sin(x+60`)+2sin(x-60`)-」3cos(120`-x)的值 化简f(x)=2sin(x+θ/2)cos(x+θ/2)+2√3cos^(x+θ/2)-√3最后那一步怎么来的？ sin(x+派/3)+2sin(x-派/3)-根号3cos(2派/3-x) sin(x+π/3)+2sin(x-π/3)-√3cos(2π/3 - x)化简、、、 设函数f(x)=sin(x+π/3)+2sin(x-π/3)-根号3cos(2π/3-x)求f(π/6) f(π/3)的值.. 求过程,求速度.. sin(a+π/3)+2sin(a-π/3)-根号3cos（2π/3-a） 求证sin(x+3/1π)-根号3cos(3/2π-x)=2sin(x-3/1π)=0 化简2sin^2[(π/4)+x]+根号3（sin^x-cos^x）-1 f(x)=2sin^2(π/4+x)+根号3(sin^2x+cos^2x)f(x)=2sin^2(π/4+x)+根号3(sin^2x-cos^2x) 符号打错了 x∈[π/4,π/3],f(x)=1/2sin(x-5π/12)cos(5π/12-x)+[(根号3)/2][sin(x+4)]^2化简一下就行 sin(3π/2-x)化简 sin(x+π) sin(x+3/2π)怎么化简? 化简 cos^2(x)*sin^2(x)-sin^2(x) sin(2α-TT/4)如何化简 化简cos∧2(π／4)-sin∧2（π／4-a）得到? 根号sin^α-sin^4α（π/2〈α〈π）化简根号sin平方α-sin4次方α（π/2〈α〈π）化简·········· 将分式x²/x²+x化简得x/x+1,则必须满足 分式化简过程 （x-3）/（x²-1）-（2）/（1+x） x²-1/x-1是不是分式,化简后是x+1 化简分式x²-1分之x²+x 将分式x²+x分之x²化简得x+1分之x,则x必须满足 化简︱︱x-1︱-2︱ 化简比. 化简比急