[oqlf Senior director] [An object moves in simple harmonic motion described by the equation dequals negative 6 cosine StartFraction pi Over 3 EndFraction t, where t is measured in seconds and d in inches. Find the following.a. the maximum displacement b. the frequency c. the time required for one cycle] [пояс шины] [sư�c khỏe] [cá» dại] [Hữu Ngá» c] [phe binh van hoc hau hien dai] [giang_ho_tham_an_truyen_ky--chu_tieu_xuyen] [Tìm tòi cách giải toán qua olympic] [s����K����]