Find the Solutions of the Equation That Are in the Interval

question 10

Multiple Choice

Find the solutions of the equation that are in the interval $[ 0,2 \pi ) .$ $\cot ^ { 2 } u \cos u = \cos u$

• A) \(\frac { \pi } { 4 } , \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } , \frac { 7 \pi } { 4 }\)
• B) \(0 , \pi , \frac { \pi } { 2 } , \frac { 3 \pi } { 2 }\)
• C) \(0 , \pi , \frac { \pi } { 4 } , \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } , \frac { 7 \pi } { 4 }\)
• D) \(\frac { \pi } { 2 } , \frac { 3 \pi } { 2 } , \frac { \pi } { 4 } , \frac { 3 \pi } { 4 } , \frac { 5 \pi } { 4 } , \frac { 7 \pi } { 4 }\)
• E) no solution

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