Images 4 COS 2A

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4 cos 2a. Cos a/2 + cos3a/2 +cos a. Cosa+cos2a+cos3a. Cos п/4. Cos 3/2.
Cos a/2 + cos3a/2 +cos a. Cosa+cos2a+cos3a. Cos п/4. Cos 3/2.

See also