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Solve the Multiple-Angle Equation cos3x6=22\cos \frac { 3 x } { 6 } = \frac { \sqrt { 2 } } { 2 }

Question 8

Multiple Choice

Solve the multiple-angle equation.​ cos3x6=22\cos \frac { 3 x } { 6 } = \frac { \sqrt { 2 } } { 2 }


A) π3+2nπ,2π3+2nπ\frac { \pi } { 3 } + 2 n \pi , \frac { 2 \pi } { 3 } + 2 n \pi
B) ​ π3+4nπ,2π3+4nπ\frac { \pi } { 3 } + 4 n \pi , \frac { 2 \pi } { 3 } + 4 n \pi
C) ​ π3+3nπ,2π3+3nπ\frac { \pi } { 3 } + 3 n \pi , \frac { 2 \pi } { 3 } + 3 n \pi
D) ​ π2+4nπ,7π2+4nπ\frac { \pi } { 2 } + 4 n \pi , \frac { 7 \pi } { 2 } + 4 n \pi
E) ​ 5π3+2nπ,4π3+3nπ\frac { 5 \pi } { 3 } + 2 n \pi , \frac { 4 \pi } { 3 } + 3 n \pi

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