Use an Identity to Write the Expression as a Single $$\cos ^ { 2 } 4 x - \sin ^ { 2 } 4 x$$

question 487

Multiple Choice

Use an identity to write the expression as a single trigonometric function or as a single number.
- $$\cos ^ { 2 } 4 x - \sin ^ { 2 } 4 x$$

• A) \(2 \sin 4 x\)
• B) \(\frac { 1 } { 2 } \sin 16 x\)
• C) \(\cos 4 x\)
• D) \(\cos 8 x\)

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