PS: note that sin(2x)/cos(2x) = tan(2x) which makes checking a bit quicker.
2 cos x = 2 sinx cos x / cos 2x from the original equation. Cancel "2 cos x" on both sides.
I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.