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nyusha1990
@nyusha1990
August 2021
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АЛГЕБРА!!!ПОМОГИТЕ!
1.Упростите выражение:
cos x*cos(2п-x)+2-sin²x
2.Найдите значение выражения
√6 cosα ,если sin α=1/√3 ; α∈-п/2≤α≤п/2
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