Question

化简:(1+sin^2x-cos^2x-sinx)/(2sinxcosx-cosx) 要详细过程~~~~急急急！！！！！

Answer 1

点击图片看看OK不？又不懂得再问~

Answer 2

(1+sin^2x-cos^2x-sinx)/(2sinxcosx-cosx)
=(sin^2x+cos^2x+sin^2x-cos^2x-sinx)/(2sinxcosx-cosx)
=(2sin^2x-sinx)/(2sinxcosx-cosx)
=[sinx(2sinx-1)]/[cosx(2sinx-1)]
=tanx