问题
填空题
函数f(x)=ex-cosx在x=0处的切线方程是______.
答案
∵f(x)=ex-cosx,
∴f′(x)=ex+sinx,f(0)=e0-cosx=0,
∴k=f′(0)=e0+sin0=1,
∴函数f(x)=ex-cosx在x=0处的切线方程是y=x.
故答案为:y=x.
函数f(x)=ex-cosx在x=0处的切线方程是______.
∵f(x)=ex-cosx,
∴f′(x)=ex+sinx,f(0)=e0-cosx=0,
∴k=f′(0)=e0+sin0=1,
∴函数f(x)=ex-cosx在x=0处的切线方程是y=x.
故答案为:y=x.