If f(x)=sinx+tanx2+sinx22+tanx23+…+sinx2n−1+tanx2n is a periodic function with period kπ, then k=
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a
1
b
2
c
2n
d
12n
answer is C.
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Detailed Solution
sinx,sinx22,…,sinx2n−1 are periodic functions with period 2π,23π,25π,…,2nπ, respectively and tanx2,tanx23 ,tanx25,…,tanx2n are periodic functions with period 2π ,23π,25π,…,2nπ, respectively. L.C.M. of 2π,23π,25π,…2nπ is 2nπ .Hence f(x) is a periodic function with period 2nπ . ∴k=2n