Can someone me answer this question

If cos(2x) = tan^2(y), show that cos(2y) = tan^2(x).

Complete each statement from the information given and the triangle criterion you used. if the triangles cannot be shown to be congruent, leave the box for the second triangle blank and choose for reason “cannot be determined.” carbon - regular hexagon. ∆can ≅ ∆ by

Write as a product: ac^2–ad+c^3–cd–bc^2+bd