Question

prove that √(sec^2a+cosec^2a) = tan a + cot a

Answer 1

Lhs= =√1+tan^2a+1+cot^2a =√2+tan^2a+cot^2a =√2tana×cota+tan^2a+cot^2a √(tana+cota)^2 Tana +cota Hence proved