若tan(α+β)=3tanα,求证2sin2β-sin2α=sin(2α+2β),

来源:学生作业帮助网 编辑:作业帮 时间:2024/09/06 08:28:31
xAN@2ipWn@jBJ *r+^jdǦ?O;yJhx[yVqTK뜷x%P(Th͗Q~W2rLZ@/.:AB@'8vuH$)pCnKڠ~0C7es4BqB,„;9ciqkHsת{mO[ I@q(y9f}&I؇z!wkj|ޭ.(y$_:!܃'az۴"YEld>1_5 UEL〵ip.qj[8P360 .y|&