Hi,
Have this problem not sure if i've answered the question or not?
Verify the identity; (secA - 1) / (secA +1) + (cosA -1) / (cos A + 1) = 0
i changed secA into 1/cosA then re arrange and manipulated the LHS so at the end i get 1 - cos^2(x) = 1 - cos^2(x) or that the lhs had = 0 but not sure if i have properly answered the question?