cos x +(1)/(3)cos^(3)x+(1)/(5)cos^(5)x+…...

`cos x +(1)/(3)cos^(3)x+(1)/(5)cos^(5)x+…..oo=`

A

log tan x

B

log cot x

C

log tan(x/2)

D

log cot(x/2)

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The correct Answer is:

D

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