### Home > INT3 > Chapter 9 > Lesson 9.2.1 > Problem 9-102

9-102.

Should *y* = sin(*x*) and *y* = cos(*x*) both be parent functions, or is one the parent of the other? Give reasons for your decision. Homework Help ✎

Notice that the sine curve could be shifted horizontally to match the cosine curve, or vice-versa.

What is the horizontal shift?