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Find-1-4-cos-2-40-1-cos-20-2-4-cos-2-40-1-cos-20-




Question Number 207326 by hardmath last updated on 11/May/24
Find:  1.   4 cos^2  40° − (1/(cos 20°)) = ?  2.   4 cos^2  40° +  (1/(cos 20°)) = ?
Find:1.4cos240°1cos20°=?2.4cos240°+1cos20°=?

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