4-3*4+2=6....... ..........................
<span>task/24760498
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cos(arccos(-корень из 3/2)-arcsin 0)
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</span>cos(arccos(-(√<span>3)/2) - arcsin 0) = </span>cos((π -π/3)<span> - 0 )=</span>cos(π -π/3) =cosπ/3 = (√<span>3)/2.
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ответ : (√<span>3)/2.</span>
7-18у+12=-18у+19 думаю так