Verify the identity sec Ocos 0 = tan 0 cot e 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 0 cos 0 sec 0 cot 0 cot 0 Apply a reciprocal identity Factor out the greatest common factor, sec 0. Separate the quotient into two terms Apply a Pythagorean identity