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liravaleevap58h88
@liravaleevap58h88
December 2021
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Вычислить cos(0,5arccos(1/8))
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dnepr1
Verified answer
Примем угол
arccos(1/8) за
α.
Требуется найти косинус половинного угла.
Используем формулу половинного угла:
cos(α/2) = √((1+cos α)/2) = √(((1+(1/8))/2) = √(9/(2*8)) = 3/4 = 0,75.
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Answers & Comments
Verified answer
Примем угол arccos(1/8) за α.Требуется найти косинус половинного угла.
Используем формулу половинного угла:
cos(α/2) = √((1+cos α)/2) = √(((1+(1/8))/2) = √(9/(2*8)) = 3/4 = 0,75.