若f(x)=(1+1/tanax)sin²ax-2sin(ax+π/4)sin(ax-π/4),(a>0)……
问题描述:
若f(x)=(1+1/tanax)sin²ax-2sin(ax+π/4)sin(ax-π/4),(a>0)……
……(接上)的图像与直线y=m相切,相邻切点的距离为π/2.
①求m和a的值;②若点A(x,y)是y=f(x)图像的对称中心,且x∈[0,π/2],求点A的坐标
答
f(x)=(1+1/tanax)sin²ax-2sin(ax+π/4)sin(ax-π/4),化简得,f(x)=sin²ax+cosax*sinax-cos(2ax)-cos(π/2) f(x)=sin²ax+cosax*sinax-cos(2ax) f(x)=sin²ax+cosax*si...