Review the proof (not in order) of the identity Tangent (StartFraction theta Over 2 EndFraction) = plus-or-minus StartRoot StartFraction 1 minus cosine (theta) Over 1 + cosine (theta) EndFraction EndRoot..
What is the correct sequence of steps?
1-3-2-4-5
1-3-4-2-5
1-4-2-3-5
1-4-3-2-5