Apakah tempoh f (theta) = tan ((theta) / 9) - sec ((7theta) / 6)?

Apakah tempoh f (theta) = tan ((theta) / 9) - sec ((7theta) / 6)?
Anonim

Jawapan:

# (108pi) / 7 #

Penjelasan:

Tempoh tan x -># pi #

Tempoh #tan (x / 9) -> 9pi #

Tempoh #sec ((7x) / 6) # = Tempoh #cos ((7x) / 6) #

Tempoh #cos ((7x) / 6) -> (12pi) / 7 #

Paling tidak banyak # (9pi) dan (12pi) / 7 # --> # 9pi (12/7) # --> # (108pi) / 7 #

Tempoh #f (x) -> (108pi) / 7 #