Question

if sec A=cosec B,then find A+B

Answer 1

sec A= sec (90-B)
A=90-B
A+B=90

I hope it helps you.

Answer 2

By identity, Sec A = Cosec (90-A)
Sec A = Sec (90-B)
Sec will be eliminated
= A=90 - B
= A+B= 90