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

What are the relative frequencies, to the nearest hundredth, of the rows of the two-way table? group 1: a 15 b 45 group 2: a 20 b 25

Iam a rectangle. my perimeter is 60 feet. how much are do i cover?

In the figure below, ∠dec ≅ ∠dce, ∠b ≅ ∠f, and segment df is congruent to segment bd. point c is the point of intersection between segment ag and segment bd, while point e is the point of intersection between segment ag and segment df. the figure shows a polygon comprised of three triangles, abc, dec, and gfe. prove δabc ≅ δgfe.