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Give the Exact Value of the Expression $\cos \left( 2 \arcsin \frac { 1 } { 4 } \right)$

Question 47

Multiple Choice

Give the exact value of the expression.
- $\cos \left( 2 \arcsin \frac { 1 } { 4 } \right)$

A) $\frac { 5 } { 8 }$
B) $\frac { 1 } { 8 }$
C) $\frac { 3 } { 8 }$
D) $\frac { 7 } { 8 }$

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