Trigonometry Transformations of Trigonometric Graphs Transformations of the Cosine Graph
Phase Shift
   Concepts 1

Definition 
.
If y = A· cosbx and b is nonzero number, then for any real number c the phase shift, s,
of the graph of the function y = A· cos(bx + c) respecting to the graph of function y = A· cos bx is defined to be .
The shift is to the left if is negative, and to the right if is positive.
   

The shift is to the right.

The shift is to the left.


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