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AnnaGreenova23
@AnnaGreenova23
September 2021
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Найти значение выражения
(cos 45-1)*(cos 45+1)
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Камиль7107
Cos45=√2/2
(√2/2-1)*(√2/2+1)=(√2/2-1)^2=0,5-1=-0,5
вроде так.
0 votes
Thanks 2
AnnaGreenova23
Да, у меня так же получилось, спасибо
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Answers & Comments
(√2/2-1)*(√2/2+1)=(√2/2-1)^2=0,5-1=-0,5
вроде так.