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zdanova1996
@zdanova1996
August 2022
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Cos^(2)x-2sin x=-(1/4)
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irinas12
1-sin^2x-2sinx=-(1/4) -sin^2x -2 sinx +1,25=0, вводим новую переменную -а^2 - 2a+1,25 = 0 D= 4+5=9, x= 1/2 sinx=1/2, x=(-1)^n пи/6+пиn
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