Question

Proof:

Answer 1

\[\frac{ 2}{ \sin a } = \tan \frac { a } {2} + \frac{ 1 }{ \frac{ \tan a }{ 2 } }\]

Answer 2

i've tried a lot of different things, converting tan to sin/cos, the cot to cos/sin, as well as using the tan (2a) formula, dividing it by 4, but I'm getting nowhere.

Answer 3

\[\frac{ 1 }{ \tan a / 2 }\] is the last term, by the way

Answer 4

\(\dfrac{1}{\tan( \tfrac{a}{2})} \)?

Answer 5

yes

Answer 6

Did you try the double angle formula?

Answer 7

Ah, yes... I see you said you did. My bad.

Answer 8

one of the 1/2 angle identities help?