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Evaluate the Expression cos10α\cos 10 \alpha A) cos25α+sin25α\cos ^ { 2 } 5 \alpha + \sin ^ { 2 } 5 \alpha

Question 29

Multiple Choice

Evaluate the expression. cos10α\cos 10 \alpha


A) cos25α+sin25α\cos ^ { 2 } 5 \alpha + \sin ^ { 2 } 5 \alpha
B) cos45α+sin45α\cos ^ { 4 } 5 \alpha + \sin ^ { 4 } 5 \alpha
C) cos45αsin45α\cos ^ { 4 } 5 \alpha - \sin ^ { 4 } 5 \alpha
D) cos25αsin25α\cos ^ { 2 } 5 \alpha - \sin ^ { 2 } 5 \alpha
E) cos45αsin25α\cos ^ { 4 } 5 \alpha - \sin ^ { 2 } 5 \alpha

Correct Answer:

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