prove that : sec(70-A) = cosec(20+A) Share with your friends Share 0 Anuradha Sharma answered this sec70-A=sec90-20-A=sec90-20+A=cosec20+AAs we know that sec90-x=cosecx 8 View Full Answer Priyanshu Jena answered this sec(70-A) =sec(90-(70-A)) (since, sec(90-theta)=cosec theta) =cosec(20+A) 4
