f(x)=sin(x+π/6)+sin(x-π/6)+cosx+af(x)=2sinxcos(π/6)+cosx+a用的是什么公式?

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f(x)=sin(x+π/6)+sin(x-π/6)+cosx+af(x)=2sinxcos(π/6)+cosx+a用的是什么公式?

f(x)=sin(x+π/6)+sin(x-π/6)+cosx+af(x)=2sinxcos(π/6)+cosx+a用的是什么公式?
f(x)=sin(x+π/6)+sin(x-π/6)+cosx+a
f(x)=2sinxcos(π/6)+cosx+a
用的是什么公式?

f(x)=sin(x+π/6)+sin(x-π/6)+cosx+af(x)=2sinxcos(π/6)+cosx+a用的是什么公式?
用下面的公式化简
Sin(α+β)=sinαcosβ+sinβcosα

f(x)=sin(x+π/6)+sin(x-π/6)+cosx+a
=[sin(x)cos(π/6)+cos(x)sin(π/6)]+[sin(x)cos(π/6)-cos(x)sin(π/6)]+cosx+a
=2sinxcos(π/6)+cosx+a
用的是两角和与差的三角函数公式化简后是sinx*cosπ/6+sinx*cosπ/6+cosx+a

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f(x)=sin(x+π/6)+sin(x-π/6)+cosx+a
=[sin(x)cos(π/6)+cos(x)sin(π/6)]+[sin(x)cos(π/6)-cos(x)sin(π/6)]+cosx+a
=2sinxcos(π/6)+cosx+a
用的是两角和与差的三角函数公式

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f(x)=sin(x+π/6)+sin(x-π/6)+cosx 的单调递增区间 已知F(X)=根号3COS^2 X+SIN XCOS X-2SIN X*SIN(X-π/6),求F(X)的最大值 f(x)=sin(2x+π/6)怎么求导 f(x)=sin^2-sin[2x-(π/6)]的值域过程 f(tanx)=sin(π/6-x)求:f(cotx)f(tanx)=sin(π/6-x) 求:f(cotx) 已知函数f（x）=［2sin（x-π/6）+√3sin x］cos x+sin^2x,x∈R 已知f(x)=sin f(x)=(6sin^4x-7sin^2x+2)/(sin^2x-cos^2x) 已知函数f(x)=sin(2x+π/6)+sin（2x+π/6）+2cos²x 若f(x)=sin πx/6,则f(1)+f(2)+...+f(102)=? f(x)=（1+cotx)sin^2x-2sin(x+π/4)sin(x-π/4)还有一题, 已知函数f(x)=(1+1 anx)sin^2x+m sin(x+π/4)sin(x-π/4) 设f(x)={sinπx(x 设f(x)={sinπx(x 设 f(x)= {sinπx(x 设f(x)={sinπx(x 已知函数f(x)=2sin(ax-π/6)sin(ax+π/3) f（x)=sin(2x+π/6）+2sin（x-π/4）sin（x+π/4） 怎么化简为形函数