Apakah amplitud dan tempoh y = -4cos2x?

Apakah amplitud dan tempoh y = -4cos2x?
Anonim

Jawapan:

# 4, pi #

Penjelasan:

# "bentuk standard kosinus adalah" #

#color (merah) (bar (ul (| warna (putih) (2/2) warna (hitam) (y = acos (bx + c)

# "amplitud" = | a |, "period" = (2pi) / b #

# "peralihan fasa" = -c / b, "peralihan menegak" = d #

# "here" a = -4, b = 2, c = d = 0 #

#rArr "amplitud" = | -4 | = 4, "period" = (2pi) / 2 = pi #