Photos COS ПИ X

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Cos пи x. Sin x Pi 3 cos x-Pi/6 1. Sin(x+Pi/6)+cos(x+Pi/3)=1+cos2x. Sinx(3pi/2+x). Cos(2x-пи/ 6) >-1/2.
Sin x Pi 3 cos x-Pi/6 1. Sin(x+Pi/6)+cos(x+Pi/3)=1+cos2x. Sinx(3pi/2+x). Cos(2x-пи/ 6) >-1/2.

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