已知函数f(x)=2sin(2x+π/6).将函数y=f(x)的图像向右平移π/4个单位,得到y=g(x)的图像,
,已知函数f(x)=2sin(2x+π/6).将函数y=f(x)的图像向右平移π/4个单位,得到y=g(x)的图像,求直线y=(根号6)与函数y=f(x)+g(x)的图像...
,已知函数f(x)=2sin(2x+π/6).将函数y=f(x)的图像向右平移π/4个单位,得到y=g(x)的图像, 求直线y=(根号6)与函数y=f(x)+g(x)的图像在(0,π)内所有交点的坐标.
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2013-09-01
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g(x)=2sin(2x+π/6-π/2)=-2cos(2x+π/6)
y=2sin(2x+π/6)-2cos(2x+π/6)=根号6
<=>((根号2)/2)sin(2x+π/6)-((根号2)/2)cos(2x+π/6)=(根号3)/2
<=>sin(2x+π/6)cosπ/4-cos(2x+π/6)sinπ/4=(根号3)/2
=>sin(2x-π/12)=(根号3)/2 且x属于(0,π)
=>x=37.5°或67.5°
y=2sin(2x+π/6)-2cos(2x+π/6)=根号6
<=>((根号2)/2)sin(2x+π/6)-((根号2)/2)cos(2x+π/6)=(根号3)/2
<=>sin(2x+π/6)cosπ/4-cos(2x+π/6)sinπ/4=(根号3)/2
=>sin(2x-π/12)=(根号3)/2 且x属于(0,π)
=>x=37.5°或67.5°
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