Images 2SIN Π X

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2sin π x. Sin π 4 − x sin π 4 + x = cos 2x.. Cos(2π-x) +sin(π/2+x) =√2. Sin (4x - π/3) = - √2 / 2. Sin 2x = π/4.
Sin π 4 − x sin π 4 + x = cos 2x.. Cos(2π-x) +sin(π/2+x) =√2. Sin (4x - π/3) = - √2 / 2. Sin 2x = π/4.

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