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Complete the Identity cos⁡(4θ)= ? \cos ( 4 \theta ) = \text { ? }

Question 50

Multiple Choice

Complete the identity.
- cos⁡(4θ) = ? \cos ( 4 \theta ) = \text { ? }


A) 3sin⁡θ−4sin⁡3θ3 \sin \theta - 4 \sin ^ { 3 } \theta
B) cos⁡4θ−6sin⁡2θcos⁡2θ+sin⁡4θ\cos ^ { 4 } \theta - 6 \sin ^ { 2 } \theta \cos ^ { 2 } \theta + \sin ^ { 4 } \theta
C) 4sin⁡θcos⁡3θ−4sin⁡3θcos⁡θ4 \sin \theta \cos ^ { 3 } \theta - 4 \sin ^ { 3 } \theta \cos \theta
D) cos⁡3θ−3sin⁡2θcos⁡θ\cos ^ { 3 } \theta - 3 \sin ^ { 2 } \theta \cos \theta

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