Solve the Equation in the Interval $[ 0,2 \pi )$ $2 \cos ^ { 2 } x + \sin x = 1$

question 11

Multiple Choice

Solve the equation in the interval $[ 0,2 \pi )$ . $2 \cos ^ { 2 } x + \sin x = 1$

• A) \(\frac { \pi } { 6 } , \frac { \pi } { 2 }\)
• B) \(\frac { \pi } { 6 } , \frac { \pi } { 3 }\)
• C) \(\frac { \pi } { 2 } , \frac { 7 \pi } { 6 }\)
• D) \(\frac { \pi } { 6 } , \frac { 11 \pi } { 6 }\)
• E) none

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