求最小正數(shù)Ｍ
熱心網(wǎng)友
y=cosx-√3sinx=2(cosxcosπ/3-sinπ/3sinx)=2cos(x+π/3)(x,y)關(guān)于x=π/4的對稱點為(π/2-x,y)y=2cos(x+π/3)關(guān)于x=π/4的對稱方程為y=2cos(π/2-x+π/3)=2cos(x-5π/6)要向右平移π/3+5π/6+2kπk=0時最小正數(shù)Ｍ=7π/6
求最小正數(shù)Ｍ
y=cosx-√3sinx=2(cosxcosπ/3-sinπ/3sinx)=2cos(x+π/3)(x,y)關(guān)于x=π/4的對稱點為(π/2-x,y)y=2cos(x+π/3)關(guān)于x=π/4的對稱方程為y=2cos(π/2-x+π/3)=2cos(x-5π/6)要向右平移π/3+5π/6+2kπk=0時最小正數(shù)Ｍ=7π/6