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Question 47
Solve the equation in the interval [0,2π) [ 0,2 \pi ) [0,2π) . 2cos2x+sinx=12 \cos ^ { 2 } x + \sin x = 12cos2x+sinx=1
A) π6,π2\frac { \pi } { 6 } , \frac { \pi } { 2 }6π,2π B) π6,π3\frac { \pi } { 6 } , \frac { \pi } { 3 }6π,3π C) π2,7π6\frac { \pi } { 2 } , \frac { 7 \pi } { 6 }2π,67π D) π6,11π6\frac { \pi } { 6 } , \frac { 11 \pi } { 6 }6π,611π E) none
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Q46: Find all solutions of
Q48: Find the exact value of the
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Q50: Find the exact value of
Q51: Let Q52:
Q52:
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