Question

If secA+tan A=x and secA-tan A=y , then show that xy=1

Answer 1

Multiply both LHS u will get identity and RHS u will get xy Finally ur answer

Answer 2

Sec A + Tan  A  =  x
Sec A - Tan A  = y

multiply the above  LHS :

(sec A  + Tan A) (Sec A - Tan A) = x y
Sec² A - Tan² A = x y
1 = xy