Prove that sec^2x-cosec^2x=tan^2x-cot^2x

Polynomial that can be factored as (3x-4)(3x+4)

Which expression gives you the distance between the points (5,1)and(9,-6)

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.