Question

the period of cos 5 thita is
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Answer 1

question clear nahin h

Answer 2

Given : function  Cos 5θ

To Find : Period of Cos 5θ

Solution

Period of a function is the interval at which  function returning to the same value.

if p is the period of a function f(x)

=> f(x + p) = f(x)

Period of  cosθ  is  2π

Period of cos ( bθ)    =   2π/b

hence period of cos 5θ  = 2π/5

period of cos 5θ is 2π/5  

As

Cos(5θ   + 2π) =  Cos(5θ)

  5θ   + 2π =  5 (θ   + 2π/5 )

=> Cos (5 (θ   + 2π/5)  = Cos (5 θ)

Hence period of Cos 5θ is 2π/5

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