### Home > PC3 > Chapter 8 > Lesson 8.3.3 > Problem 8-128

8-128.

Write each of the following expressions using sigma notation. Homework Help ✎

cos(2) + 2 cos(4) + 3 cos(6) + … + 15 cos(30)

Use the same thinking process as (a) and (b) above.

8-128.

Write each of the following expressions using sigma notation. Homework Help ✎

cos(2) + 2 cos(4) + 3 cos(6) + … + 15 cos(30)

Use the same thinking process as (a) and (b) above.