1. The problem statement, all variables and given/known data sec^2(x) tan^2(x) + sec^2(x) = sec^4(x) 2. Relevant equations sin^2 + cos^2 = 1 1+tan^2 = sec^2 1+cot^2 = csc^2 3. The attempt at a solution First, I changed everything to sin and cos to try and make it clearer. 1/cos^2 * sin^2/cos^2 + 1/cos^2 = sec^4 sin^2/cos^4 + 1/cos^2 Then I multiplied by the common denominator, cos^2 sin^2 * cos^2/cos^6 + cos^2/cos^4 Where do I go from here??