Q.
If the period of cos(sin(nx))tanxn,n∈N, is 6π, then n=
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a
3
b
2
c
6
d
1
answer is C.
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Detailed Solution
The period of cossin nx =πn since cossinnπn+x =cos-sinnx =cossinnx the period of tan xn =π1n=nπthus , 6π= LCM πn,πn =π · LCM 1,n i.e numerators HCF n,1 i.e denominators =nπ n=6
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