Find the period of each of the following functions ({.} is fractional part of x)
(i)`f(x) = sin x`
,(ii) `f(x) = sin x + tan x`
(iii) f(x) = 2 + sin x     (iv)`f(x) = |sin x| + |cos x|`
(v) `f(x) = x − [x]`      (vi) `f(x) = 2 + x − [x]`
(vii) `f(x) = sin x + x − [x]`