### Home > PC3 > Chapter 10 > Lesson 10.1.1 > Problem 10-12

10-12.

Write the equation of a cosine function that has a maximum at

Horizontal shift: Since the maximum point is at (2, 5) a cosine function has been shifted 2 units right.

Since a maximum is at and a minimum is at

*, half of a cycle is*

Use the formula

*to calculate*

*.*