f(x)=log1/2^(1-sinx)/(1+sinx)的周期怎么求?
问题描述:
f(x)=log1/2^(1-sinx)/(1+sinx)的周期怎么求?
答
请问是这样吗?f(x)=log1/2^[(1-sinx)/(1+sinx)]=-(1-sinx)/(1+sinx)log2lnf(x)=-ln(1-sinx)+ln(1+sinx)-lnlog2ln(1+t)=t-t^2/2+t^3/3+...+(-1)^nt^(n+1)/(n+1)ln(1-t)=-t-t^2/2-t^3/3+...+t^(n+1)/(n+1)ln(1+t)-ln(1...