()因(2)=1m+1/(x+2)=m(+2)+∞(x+32)=1+1sm=/) 据经验,知y =| sin el+|cosx的T= (6)因f(x)=tanx的T=丌,则y= Tana的T=丌 (7)因y=x-团]=(x),则y=x-[]的T=18 (5) œf(x) = | sin x| + | cos x|, f  x + π 2  =    sin  x + π 2    +   cos  x + π 2    = | cos x| + | sin x| = f(x) ‚²ßy = | sin x| + | cos x|T = π 2 . (6) œf(x) = tan xT = πßKy = √ tan xT = π. (7) œy = x − [x] = (x)ßKy = x − [x]T = 1. (8) T = 2π nπ = 2 n