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ntatalyagurina
@ntatalyagurina
August 2021
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Найдите косинус 2 альфа, если синус альфа равен 0,7
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horinvan
Cos2a = 1- sin^2a;
cos2a = 1-2*0.49=1-0.98=0.02. ( ^2 - в квадрате) (a -заменено букву альфа)
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Answers & Comments
cos2a = 1-2*0.49=1-0.98=0.02. ( ^2 - в квадрате) (a -заменено букву альфа)