F=cos^2(x)+tan^2(x).求F(X)
f ' (sinx)=cos^2x,求f(x)
已知f(x)=sin(π-x)cos(2π-x)tan(-x+π)/cos(-π/2+x),求f(-31π/3)的值
f(x)=sin(派-x)cos(2派-x)/sin(派/2+x)tan(派+a) 求f(31派/3)
f(x)有定义,f(2x)=f(x)cos x,lim f(x)=f(0)=1(x趋于0时),求f(x)
设f=[sin(2/x)]=1+cosx,求f(x),f[cos(2/x)].
已知f(x)=(sin(π-x)*cos(2π-x))/cos(-π-x)*tan(π-x),则f(-31π/3)的值为
求函数f(x)=cos(x^2+√x)的导数f′(x)
f(x)=|sin x+cos x+tan x+cot x+sec x+csc x|最小值
f(x)=1/cos²x-tan²x+根号2*sin(2x-π/4)
已知函数f(x)=cos(2x-π/3)+sin^2x-cos^2x,设函数g(x)=[f(x)]^2+f(x),求g(
已知tan=2,求(cos x+sin x)/(cos x-sin x)+sin^2x
sin A-2cos A=0 (1)求tan A (2)求函数f(x)=cos 2x+tan Asin x(x属于R)的