f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?1楼的写得什麽符号啊,

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f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?1楼的写得什麽符号啊,
f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?
f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?
1楼的写得什麽符号啊,

f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?f(x)=cos^2+√3/2sin2x怎麼变sin(2x+π/6)+1/2?1楼的写得什麽符号啊,
cos2x=2cos²x-1
cos²x=1/2cos2x+1/2
f(x)=cos²x+√3/2sin2x
=1/2cos2x+1/2+√3/2sin2x
=sinπ/6cos2x+cosπ/6sin2x+1/2
=sin(π/6+2x)+1/2
=sin(2x+π/6)+1/2

f(x)=cos^2x+√3/2sin2x=1/2(cos2x+1)+√3/2sin2x=(1/2)cos2x+√3/2sin2x+1/2
=sinπ/6cos2x+cosπ/6sin2x+1/2
=sin(2x+π/6)+1/2

f(x)=(1+cos2x)/2+根3/2sin2x
=sin(2x+pi/6)+1/2