Mathematics, 27.10.2020 19:10, arlettg

Review the proof of Cosine (StartFraction theta Over 2 EndFraction) = plus-or-minus StartRoot StartFraction 1 + cosine theta Over 2 EndFraction EndRoot. Which step contains an error?

Review the proof of Cosine (StartFraction theta Over 2 EndFraction) = plus-or-minus StartRoot Start

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Review the proof of Cosine (StartFraction theta Over 2 EndFraction) = plus-or-minus StartRoot StartF...