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2sin π x. Sin(2π-x). Cos(π-x)-sin (π/2+x/2). Cos(3π2+x). Cos(2π-x) +sin(π/2+x) =√2.
Sin(2π-x). Cos(π-x)-sin (π/2+x/2). Cos(3π2+x). Cos(2π-x) +sin(π/2+x) =√2.

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