化简 (tan(a+b)-tana-tanb)/(tanatan(a+b))
问题描述:
化简 (tan(a+b)-tana-tanb)/(tanatan(a+b))
答
(tan(a+b)-tana-tanb)/(tanatan(a+b))=((tana+tanb)/(1-tanatanb)-(tanatanb))/(tana*(tana+tanb)/(1-tanatanb))
=tanb