Question: COS -1 a 2 tan 72 - = b 12 where a and b are positive, coprime integers. What is a + b? 3

COS -1 a 2 tan 72 - = b 12 where a

COS -1 a 2 tan 72 - = b 12 where a and b are positive, coprime integers. What is a + b? 3

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