设X1,X2是方程x2-xsin(π/5)+cos(π/5)=0的两根,则arctanx1+arctanx2的值是?
问题描述:
设X1,X2是方程x2-xsin(π/5)+cos(π/5)=0的两根,则arctanx1+arctanx2的值是?
答
设X1,X2是方程x2-xsin(π/5)+cos(π/5)=0的两根,则arctanx1+arctanx2的值是?