化简sin(啊尔法+贝塔)cos啊尔法-1/2[sin(2啊尔法+贝塔)-sin贝塔]

化简sin(啊尔法+贝塔)cos啊尔法-1/2[sin(2啊尔法+贝塔)-sin贝塔] cos x/sin x+sin x/(1+cos x) 化简. 化简sin a+cos a sin^2cos^2化简 sinα+cosα 化简 化简：1+sinθ+cosθ+2sinθcosθ /1+sinθ+cosθ (化简):[sin(派-啊而法)*sin( (3派/2)-啊尔法)*tan(-啊尔法-派)] / cot(啊尔法-2派)*cot( (3派/2)+啊尔法)*cos( (派/2)+啊尔法) sin cos 化简 (1-2sin@cos@)/(cos@^2-sin@^2)*(1+2sin@cos@)/(1-2sin@^2) 两分式相乘 求值:已知sin啊尔法-2cos啊尔法=0,求sin(拍-啊尔法)cos(2拍-啊尔法)sin[-啊尔法+(3拍/2)/tan(-啊尔法-...求值:已知sin啊尔法-2cos啊尔法=0,求sin(拍-啊尔法)cos(2拍-啊尔法)sin[-啊尔法+(3拍/2)/tan(-啊尔法-拍)s 化简tan a(cos a-sin a)+sin a(sin a+tan a)/1+cos a 化简：tanα(cosα-sinα)+sinα(sinα+tanα)/1+cosα. 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x 化简COS(a+B)COS(a-B)+sin平方B cos(α+β)cos(α-β)+sin²β 化简 化简(sin²α/1-cosα)-cosα 化简cos(a+b)cos(a-b)+sin^2b 化简sin(x)cos(x)cos(2x)