化简cos^2x-sin^2x+2倍根3化简成Asin（）+~的形式

化简 1/2cos x-根号3/2sin x 根3sin x+cos x 化简cos^2x-sin^2x+2倍根3化简成Asin（）+~的形式 化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x) 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x 化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x 化简sin(x)cos(x)cos(2x) 化简sin(x)cos(x)cos(2x) sin x cos x cos 2x 化简 化简 cos^2(x)*sin^2(x)-sin^2(x) 化简 cos^(2)(x)*sin^(2)(x)-sin^(2)(x) 化简sin^4x-sin^2x+cos^2x 化简:sin^4 x-sin^2 x+cos^2 x 已知sin(x)+3cos(x)=2,求sin(x)-cos(x)/sin(x)+cos(x)=? 化简sin^4x+cos^2x 化简(sin^2x-cos^4x+cos^2x-sin^4x)/(sin^2x-cos^6x+cos^2x-sin^6x) 化简[1-(sin^4 x-sin^2 xcos^2 x+cos^4 x)]/(sin^2 x)+3sin^2 x sin[cos^2(x^3+x)],求导 Sin(x/2)+cos(x/2)为什么等于根号2倍sin(x/2+派/4)?