tana=(4/5)/(-3/5)=-4/3
f(x)=根号2sin(x-a-π/4)(x属于R)
图像的对称中心为(x0,0)
则x0=a+π/4+kπ(k为整数)
tanx0=tan(a+π/4+kπ)=tan(a+π/4)
=(tana+1)/(1-tana)=(-1/3)/(7/3)=-1/7
tana=(4/5)/(-3/5)=-4/3
f(x)=根号2sin(x-a-π/4)(x属于R)
图像的对称中心为(x0,0)
则x0=a+π/4+kπ(k为整数)
tanx0=tan(a+π/4+kπ)=tan(a+π/4)
=(tana+1)/(1-tana)=(-1/3)/(7/3)=-1/7