emmamerida
02.07.2021 •
Mathematics
Cho một vật dao động điều hoà với phương trình: x=2cos(4nt+ⁿ/3) (cm) a) tìm thời điểm lần thứ nhất vật qua vị trí toạ độ x=-1cm
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Ответ:
the bottom one probably i guess