Question

Prove the following
2 + 2 + 2 + 2 cos 8x
- 2 cosx​

Answer 1

Step-by-step explanation:

https://www.shaalaa.com/question-bank-solutions/prove-the-following-2-2-2-cos8x-2-cosx-trigonometric-functions-of-double-angles_168164

Answer 2

Step-by-step explanation:

Prove the following

2 + 2 + 2 + 2 cos 8x

- 2 cosx