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Find the Exact Value of the Composition cos⁡(12arcsin⁡(513))\cos \left( \frac { 1 } { 2 } \arcsin \left( \frac { 5 } { 13 } \right) \right)

Question 407

Multiple Choice

Find the exact value of the composition.
- cos⁡(12arcsin⁡(513) ) \cos \left( \frac { 1 } { 2 } \arcsin \left( \frac { 5 } { 13 } \right) \right)


A) 31313\frac { 3 \sqrt { 13 } } { 13 }
B) 21313\frac { 2 \sqrt { 13 } } { 13 }
C) 2626\frac { \sqrt { 26 } } { 26 }
D) 52626\frac { 5 \sqrt { 26 } } { 26 }

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