It is known that the function f(x)=2cos (u /3-x/2)( 1) finds the minimum positive period t of f(×; (2) Find the monotonic increasing interval of f(x).

(1) analysis: because f (x) = 2cos (x/3-x/2) = 2cos (x/2-x/3).

T=2 /( 1/2)=4。

So the minimum positive period of f(×) T =4.

(2) Analysis: monotonically increasing interval: 2k

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