Find the Exact Values of S in the Given Interval $[ - \pi , \pi ) ; 2 \cos ^ { 2 } \mathrm {~s} = 1$

question 156

Multiple Choice

Find the exact values of s in the given interval that satisfy the given condition.
- $[ - \pi , \pi ) ; 2 \cos ^ { 2 } \mathrm {~s} = 1$

• A) \(\frac { \pi } { 4 } , \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } , \frac { 7 \pi } { 4 }\)
• B) \(- \frac { 2 \pi } { 3 } , - \frac { \pi } { 3 } , \frac { \pi } { 3 } , \frac { 2 \pi } { 3 }\)
• C) \(- \frac { 7 \pi } { 4 } , - \frac { 5 \pi } { 4 } , - \frac { 3 \pi } { 4 } , - \frac { \pi } { 4 }\)
• D) \(- \frac { 3 \pi } { 4 } , - \frac { \pi } { 4 } , \frac { \pi } { 4 } , \frac { 3 \pi } { 4 }\)

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