### Home > PCT > Chapter Ch9 > Lesson 9.1.2 > Problem 9-26

9-26.

1. Change the amplitude to 5.

2. There are now 4 cycles in 2π instead of 1.

So change the frequency '*b*'.

9-26.

1. Change the amplitude to 5.

2. There are now 4 cycles in 2π instead of 1.

So change the frequency '*b*'.