Function
What is the minimum value of , such that when the graph is shifted left by units, we get the graph ?
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1 solution
The function of f（x）=sinx+cosx= (2^1/2) sin（x+ π/4 ） , y=cosx - sinx= (2^1/2) sin（x+ 3π / 4 ）， so the function move to left in the minimum units of π/ 2 ,so the minimum number of P should be π/2 .