The period of cosh(4x) is
2πi
πi
πi2
2π
Explanation for the correct option:
Given, cosh(4x)
As we know that the period of cosh(x) is 2πi.
i.e., Tcoshx=2πi
⇒ Tcosh4x=2πi4
⇒ Tcosh4x=πi2
Hence, option (C) is the correct option.
The function f(x) = cos x + {x} (where {.} denotes the fractional part function) is
Periodic with period 1
Periodic with period π
Periodic with period 2π
Not periodic