Complete the Identity $1 - \cos ( 2 \theta ) + \cos ( 6 \theta ) - \cos ( 8 \theta ) =$

question 103

Multiple Choice

Complete the identity.
- $1 - \cos ( 2 \theta ) + \cos ( 6 \theta ) - \cos ( 8 \theta ) =$ ?

• A) \(4 \sin \theta \sin ( 3 \theta ) \sin ( 4 \theta )\)
• B) \(4 \sin \theta \cos ( 3 \theta ) \sin ( 4 \theta )\)
• C) \(4 \cos \theta \cos ( 3 \theta ) \sin ( 4 \theta )\)
• D) \(4 \cos \theta \cos ( 3 \theta ) \cos ( 4 \theta )\)