Solve the Equation on the Interval $0 \leq \theta < 2 \pi .$

question 100

Multiple Choice

Solve the equation on the interval $0 \leq \theta < 2 \pi .$
- $\cos ^ { 2 } \theta + 2 \cos \theta + 1 = 0$

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

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