化简1+sin(x-2π)*cos[x-(7π/2)]-tan(π-x)*tan(3π/2-x)-cos^2(-x)1+sin(x-2π)*cos[x-(7π/2)]-tan(π-x)*tan(3π/2-x)-cos^2(-x) 怎么化啊

化简(sin x+cos x-1)(sin x-cos x+1)/sin 2x cos x/sin x+sin x/(1+cos x) 化简. 化简 1/2cos x-根号3/2sin x 根3sin x+cos x 化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x 化简1+sin x/cos x·sin2x/2cos²（π/4-x/2） 化简2sin^2[(π/4)+x]+根号3（sin^x-cos^x）-1 化简[1-(sin^4 x-sin^2 xcos^2 x+cos^4 x)]/(sin^2 x)+3sin^2 x 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（1)√3sin x+cos x (2）√2(sin x-cos x) （3）√2cos x-√6sin x 2cos x (sin x -cos x)+1 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 化简sin（2π+x）cos（π-x）sin（π-x）/cos（x-π）sin（-π-x）sin（π+x） cos x/( 1-sin x)化简