化简:(3/sin^20)-(1/cos^20)+64sin^20

化简:(3/sin^20)-(1/cos^20)+64sin^20 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x 化简 1/2cos x-根号3/2sin x 根3sin x+cos x cos x/sin x+sin x/(1+cos x) 化简. 化简：1+sinθ+cosθ+2sinθcosθ /1+sinθ+cosθ (1+sinα+cosα)*[sin(α/2)-cos(α/2)]/√(2+2cosα)化简 （3/2*π 化简 (1-2sin@cos@)/(cos@^2-sin@^2)*(1+2sin@cos@)/(1-2sin@^2) 两分式相乘 化简[1-(sin^4 x-sin^2 xcos^2 x+cos^4 x)]/(sin^2 x)+3sin^2 x 化简（1)√3sin x+cos x (2）√2(sin x-cos x) （3）√2cos x-√6sin x 化简 麻烦具体一点①1/2cosα+√3/2sinα②√2cosα-√2sinα③sinα+cosα [1+cos.sin]/{cos+sin}的值域 化简:√[1-2sin(3-派)cos(3-派)] 化简:√[1-2sin(3-派)cos(3-派)] 化简√1-2sin(π-3)cos(π+3) 根号[1-2sin(3-π)cos(3-π)]化简 化简 1/2cos x-根号3/2sin x 化简,1/2cosα+根号3/2sinα 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x