怎么解方程cos(x)+sin(x)=0

问题描述:

怎么解方程cos(x)+sin(x)=0

cos(x)=-sin(x),1=-sin(x)/cos(x)=-tan(x)=1.x=-3/2∏+360°x=-3/2∏+2∏x=-3/2∏+2k∏,k为整数