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Косинус 2π/3. 3π/2. Косинус π/3. 3π/3.
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Sin π 12 cos π 12
Sin π α ctg π α
Ctg 2 π 4
Sin π 8 sin π 4
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Sin π 6 sin π 7
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Sin2 π 3
Cosx 2x π
Sin 3π a cos π a
Косинус 2π/3. 3π/2. Косинус π/3. 3π/3. 