If cos (A) = 1/2 with A in QIV, find sec (A/2).

If cos (A) = 1/2 with A in QIV, find sec (A/2).

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or, if you want the exact value use the half-angle formula for cosine and take the reciprocal...

So, what would be the exact angle? I'm sorry, I'm just confusing myself.

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