Mathematics
Mathematics, 16.10.2021 19:40, deena7

Cho phương trình dao động x = 4×cos(4×π×t + π÷2)∧cm a)cho biết biên độ pha ban đầu tần số góc
b)tình tần số, chu kỳ
c)tính li độ tại t=0.25 (s)

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Cho phương trình dao động x = 4×cos(4×π×t + π÷2)∧cm a)cho biết biên độ pha ban đầu tần số góc

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