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Convert the Expression cos4α\cos 4 \alpha
A)​ cos22αsin22α\cos ^ { 2 } 2 \alpha - \sin ^ { 2 } 2 \alpha

Question 36

Multiple Choice

Convert the expression.​ cos4α\cos 4 \alpha


A) ​ cos22αsin22α\cos ^ { 2 } 2 \alpha - \sin ^ { 2 } 2 \alpha
B) ​ cos22α+sin22α\cos ^ { 2 } 2 \alpha + \sin ^ { 2 } 2 \alpha
C) ​ cos42α+sin42α\cos ^ { 4 } 2 \alpha + \sin ^ { 4 } 2 \alpha
D) ​ cos42αsin42α\cos ^ { 4 } 2 \alpha - \sin ^ { 4 } 2 \alpha
E) ​ cos42αsin22α\cos ^ { 4 } 2 \alpha - \sin ^ { 2 } 2 \alpha

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