1, and the period of the function f(x) is 2.
2. The image of the function f(x) is symmetrical about the straight line x= 1/3.
Find (1) and find the value of w, φ.
(2) Find the monotone increasing interval of function f(x)
(3) Draw the image of the function f(x) on [0,2] by list method.
(1) adopts the periodic formula:
T=2π/ω,
Get ω = π;
The image of the function f(x) is symmetrical about the straight line x= 1/3.
There is -φ/ω=x= 1/3.
Get φ=-π/3.
So f(x)=sin(πx-π/3).
(2)
F(x)=sin(πx-π/3)=- 1。
X=2k- 1/6,
X+T/2=2k+5/6,
Therefore, the monotonically increasing interval of the function f(x) is:
(2k- 1/6,2k+5/6)。 k∈Z。
(3) Draw the image of the function f(x) on [0,2] by list method.
As shown in the figure.