函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简

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函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简y

函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简
函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简

函数y=cos^2(3x+π/6)-sin^2(3x+π/6)化简
y=cos^2(3x+π/6)-sin^2(3x+π/6)
=cos[2(3x+π/6)]
=cos(6x+π/3)

y=cos(6x+π/3)