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Sin4 x/4 -cos4 x/4 cos x-пи/2. 2 Cos(x/2-пи/6)=1. Cos x Pi 3 cos x-Pi 3 1 2. = Sin(x+пи/3)-1.
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Cos arccos x
Y sin cos π x
2sin cos 2 x x π
2sinx 2 cos x
Cos x п 3п
Область значения cos x
Tan 2 x cos 2 x
Y sin x cos 3x
Sin x cos 7x
Неравенство sin x cos x