数学题解答器
展开全部
解:原式=[(cosA)^2/(sinA)^2]*{[(1-cosA)/孙渗cosA]/(1+sinA)}-{1/[(sinA)^2-1]}*{(sinA-1)/[(cosA+1)/cosA]}
={cosA/[1-(cosA)^2]}*{(1-cosA)/(1+sinA)}-{cosA/激岩[(sinA)^2-1]}*{(sinA-1)/(cosA+1)}
={cosA/(1+cosA)}*{1/明凯御(1+sinA)}-{cosA/(sinA+1)}*{1/(cosA+1)}
=cosA/[(1+cosA)(1+sinA)]-cosA/[(sinA+1)(cosA+1)]
=0
={cosA/[1-(cosA)^2]}*{(1-cosA)/(1+sinA)}-{cosA/激岩[(sinA)^2-1]}*{(sinA-1)/(cosA+1)}
={cosA/(1+cosA)}*{1/明凯御(1+sinA)}-{cosA/(sinA+1)}*{1/(cosA+1)}
=cosA/[(1+cosA)(1+sinA)]-cosA/[(sinA+1)(cosA+1)]
=0
推荐律师服务:
若未解决您的问题,请您详细描述您的问题,通过百度律临进行免费专业咨询