根号3 /2SIN X-1/2COS X
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根号3 /2SIN X-1/2COS X
根号3 /2SIN X-1/2COS X
根号3 /2SIN X-1/2COS X
根号3 /2SIN X-1/2COS X
=sinxcos30-cosxsin30
=sin(x-30)
根号3 /2SIN X-1/2COS X
=sin60sinx-cos60sin30
=cos(60-x)
化简 1/2cos x-根号3/2sin x 根3sin x+cos x
化简 1/2cos x-根号3/2sin x
根号3 /2SIN X-1/2COS X
化简2sin^2[(π/4)+x]+根号3(sin^x-cos^x)-1
化简:3/2cos x-(根号3)/2sin x
cos 2x +根号下3乘sin 2x
sin(5x)-sin(3x)= 根号2cos(4x)1.sin(5x)-sin(3x)= (根号2)cos(4x)解方程2.sin(x)+sin(2x)+sin(3x)=1+cos(x)+cos(2x)
函数f(x)=负根号3sin ^2x+sin x cos x f(a/2)=1/4-根号3/2求sin a值
sin(x+派/3)+2sin(x-派/3)-根号3cos(2派/3-x)
已知Sin x+Sin y=1/2,Cos x+Cos y=根号3/3,求S求Sin(x-y)/2
方程x^2/(sin根号2-sin根号3)+y^2/(cos根号2-cos根号3)=1表示的曲线是
(cos(x/2)/(根号1+sinx))+(sin(x/2)/根号(1-cosx)),x属于(3/2π,2π)
设fx=1/2cos^2x+根号3sinxcosx+3/2sin^2x
根号3sin x+cos x要化简
已知tanx=根号下2 求:1)(sin x+cos x)/(cos x -sin x)的值.2)2sin^2 x-sin x cos x+cos^2 x 的值
(急)数学化简题根号3 sin x+cos x1-2sin2 x+sin x cos x注:sin2 x是sin平方x
化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x
已知sin X+cos X=m,|m|小于等于根号2且|m|不等于1,求sin X^3+cos X^3,sin X^4+cos X^4