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[tex]\sec x + \tan x = \tan \left (\frac{\pi}{4} + \frac{x}{2}\right )[/tex]

I've got to

[tex]\sec x + \tan x = \frac{1+\sin x}{\cos x}[/tex]

and then I was stuck. Tried half angle but it didn't seem to work.

Help please.

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# Homework Help: Proving trigo identity

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