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

question 19

Multiple Choice

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

• A) \(\{ 2 \}\)
• B) \(\left\{ - \frac { 3 } { 4 } , \frac { 3 } { 4 } \right\}\)
• C) \(\{ - 5 + 3 \sqrt { 2 } \}\)
• D) \(\left\{ \frac { 1 } { 2 } \right\}\)

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