вычислить 3-8sin^2x cos^2x если sin2x=1\4
3-8sin²x*cos²x=3-4sin²2x=3-4(0,25)²=3-0,25=2,75.
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3-8sin²x*cos²x=3-4sin²2x=3-4(0,25)²=3-0,25=2,75.