Question

sec A + tan A=m and sec A- tan A =n prove that mn =1​

Answer 1

Step-by-step explanation:

Bro that's easy.

mn = sec^2 A - tan^2 A = 1

That's a one line concept, isn't it?

Rejoice.

Answer 2

Step-by-step explanation:

we know that ,

sec^2A-tan^2A=1

then,

(secA+tanA)(secA-tanA)=mn

sec^2A-tan^2A=mn

mn=1