If tan \(\theta\) = \(\frac{m^2 - n^2}{2mn}\) find sec\(\theta\)

• A.\(\frac{m^2 + n^2}{(m^2 - n^2)}\)
• B.\(\frac{m^2 + n^2}{2mn}\)
• C.\(\frac{mn}{2(m^2 + n^2)}\)
• D.\(\frac{m^2n^2}{2(m^2 - n^2)}\)
• E.