Need help with these questions. Let COSA=1/square root of 10 5.Cos2a 6.sin2a 7.cot2a 8.tan2a

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Originally Posted by FJO Need help with these questions. Let COSA=1/square root of 10 5.Cos2a 6.sin2a 7.cot2a 8.tan2a here are the identities you need

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