Verify the identity. sec 2 0 (1 - sin 2 0) = 1 To verify the identity, start with the more complicated side and transform it to look like the other side. Choose the correct transformations and transform the expression at each step. sec 2 0 (1 - sin 2 0) = sec2 0 Apply a Pythagorean identity. Apply a quotient identity. Apply the appropriate even-odd identity. Apply a reciprocal identity