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Question: view history bookmarks window help 1nextdoubleangle and halfangle iden select...

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View History Bookmarks Window Help 1NextDouble-Angle and Half-Angle Iden Select the correct answer. What is the exact value of Cos (67.5 ○ A. -sqrt(2 + sqrt(2))/2. OB. sqrt(2-sqrt(2))/2 C. ,,sqrt(2 + sqrt(2)/4、 D. sqrt(2+ sqrt(2))/4
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