关于三角函数,sin(x/2)cos(x/2 兀/3) cos(x/2)sin(x/2 兀/3)=sin(x x 兀/3
关于三角函数,sin(x/2)cos(x/2 兀/3) cos(x/2)sin(x/2 兀/3)=sin(x x 兀/3
求导f(x) = cos(3x) * cos(2x) + sin(3x) * sin(2x).
化简y=sin^2(x)+2sin(x)cos(x)+3cos^2(x)
证明sin^2(x)+cos^2(x+30)+sin(x)cos(x+30)=3/4
f(x)=cos(2x-π/3)+2sin(x-π/4)sin(x+/4π) 三角函数
化简[1-(sin^4x-sin^2cos^2x+cos^4x)/(sin^2)]+3sin^2x
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
化简 1/2cos x-根号3/2sin x 根3sin x+cos x
三角化简sin(x-5兀)cos[(-兀/2)-x]cos(8兀-x)/sin[x-(3兀/2)]sin(-x-4兀)
三角函数已知P(-4,3) 求(cos((π/2)+x)sin(-π-x))/(cos((11π/2)-x)sin((9
(1-(sin^4x-sin^2xcos^2x+cos^4x)/sin^2x +3sin^2x
化解三角函数F(x)=sin平方x+根号3sinxcosx+2cos平方x