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Trigonometry

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Moderate

Multiple Angles: Cosine Domain

TRIG-7$EIE1

Find the exact solutions in the interval $[0,2\pi )$ for the following equation:

$2\cos { 4x-6\cos { 2x-8=0 } }$

A

$\cfrac { \pi }{ 2 } ,\cfrac { 3\pi }{ 2 }$

B

$0,\pi$

C

$0,\cfrac { \pi }{ 2 } ,\cfrac { 3\pi }{ 2 }, \pi $

D

$\text{No Solution}$