(2sin^2x-sinxcosx+cos^2x)/sin^2x+cos^2x=(2tan^x-tanx+1)/(tan^2x+1)怎么算
问题描述:
(2sin^2x-sinxcosx+cos^2x)/sin^2x+cos^2x=(2tan^x-tanx+1)/(tan^2x+1)怎么算
答
题目不清楚
1.左边的分母是sin^2x+cos^2x还是sin^2x
2.右边2tan^x部分是否有误,是否应该为2tan^2x