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  • Find the period of f(x)=cos(cosx)+cos(sinx).

Find the period of f(x)=cos(cosx)+cos(sinx).

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Solution: Here, cos(cosx) has period pi ; as is even also cos(sinx) has

period pi ;as it is even .

Thus ,          period of f(x) =1/2[LCMhspace0.2cmofhspace0.2cmpi ,pi ]=pi /2

Hence,       period of f(x)=pi /2.

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Deependra Verma

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