Find the period of f(x)=|cos x|

Answers (1)

Solution:   We have ,     f(x)=left | cos x 
ight |

      \ \ Rightarrow hspace1cmf(x)=left | cos x 
ight |=sqrtcos^2x=sqrtfrac1+cos x2

  But  the function    cos 2x  has a period   T=pi ; hence the given function 

has same period.

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