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Solve the Equation for Exact Solutions arccos⁡x+arccos⁡2x=arccos⁡12\arccos x + \arccos 2 x = \arccos \frac { 1 } { 2 }

Question 468

Multiple Choice

Solve the equation for exact solutions.
- arccos⁡x+arccos⁡2x=arccos⁡12\arccos x + \arccos 2 x = \arccos \frac { 1 } { 2 }


A) {−34,34}\left\{ - \frac { 3 } { 4 } , \frac { 3 } { 4 } \right\}
B) {12}\left\{ \frac { 1 } { 2 } \right\}
C) {2}\{ 2 \}
D) {−5+32}\{ - 5 + 3 \sqrt { 2 } \}

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