### Home > CALC > Chapter Ch2 > Lesson 2.3.1 > Problem 2-105

2-105.

You should know by now that *y* = cos*x* is an even function. But what about *y* = cos(3*x*)? What does the 3 do to the parent graph?

Compare to *y* = |*x*|.

2-105.

You should know by now that *y* = cos*x* is an even function. But what about *y* = cos(3*x*)? What does the 3 do to the parent graph?

Compare to *y* = |*x*|.