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Solve the Problem cos⁡4x=10(3+4cos⁡2x+cos⁡4x)\cos ^ { 4 } x = \frac { 1 } { 0 } ( 3 + 4 \cos 2 x + \cos 4 x )

Question 366

Essay

Solve the problem.
- cos⁡4x=10(3+4cos⁡2x+cos⁡4x)\cos ^ { 4 } x = \frac { 1 } { 0 } ( 3 + 4 \cos 2 x + \cos 4 x )

Correct Answer:

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\[\begin{array} { l }
\cos ^ { 4 } x = ...

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