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If f"(x) = – f(x) and g(x) = f'(x) and

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If f"(x) = – f(x) and g(x) = f'(x) and F(x) =(f(x/2))2+(g(x/2))2 and given that F(5) = 5, then F(10) is equal to

(A) 5 

(B) 10 

(C) 0 

(D) 15 

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Correct Option :-  (A) 

Explanation :-  

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