来自蒋毅的问题
arctan(4*w)+arctan(5*w)=5怎样求w
arctan(4*w)+arctan(5*w)=5怎样求w
1回答
2020-04-30 15:46
arctan(4*w)+arctan(5*w)=5怎样求w
arctan(4*w)+arctan(5*w)=5怎样求w
因为tan(arctanx)=x且tan(x+y)=(tanx+tany)/(1-tanx*tany)于是有:tan(arctanx+arctany)=[tan(arctanx)+tan(arctany)]/[1-tan(arctanx)*tan(arctany)]=(x+y)/(1-xy)于是对于arctan(4*w)+arctan(5*w)=5两边同...