Simplify the Expression $2 \cos ^ { 2 } 4 x - 1$

question 137

Multiple Choice

Simplify the expression.
- $2 \cos ^ { 2 } 4 x - 1$

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

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