Images COSX Π

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Cosx π. Cos (x/6 + π/4) = √2/2. Cos(x+π/4). , √2cos(π :4 -х :3) - cos x:3 =√3:2. Cos(2x−π2).
Cos (x/6 + π/4) = √2/2. Cos(x+π/4). , √2cos(π :4 -х :3) - cos x:3 =√3:2. Cos(2x−π2).

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