tan(arctan1/5+arctan3)
问题描述:
tan(arctan1/5+arctan3)
答
由tan(arctanx)=x可得 原式=[tan(arctan1/5)+tan(arctan3)]/[1-tan(arctan1/5)tan(arctan3)]=8
tan(arctan1/5+arctan3)
由tan(arctanx)=x可得 原式=[tan(arctan1/5)+tan(arctan3)]/[1-tan(arctan1/5)tan(arctan3)]=8