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Let f(x)=sinx+cos(sqrt(4-a^(2)))x. Then,...

Let `f(x)=sinx+cos(sqrt(4-a^(2)))x`. Then, the integral values of 'a' for which f(x) is a periodic function, are given by

A

{2,-2}

B

(-2,2]

C

[-2,2]

D

None of these

Text Solution

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The correct Answer is:
D
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