Q1 of 118 Page 5

Write the maximum and minimum values of cos (cos x).

Let cos x = t

Range of t =(-1,1)


∴ Maximum and Minimum value of cos x is 1 and -1 respectively.


Now,


cos(-x) = cos x


∴ Range of cos(cos x) = [cos(1),cos(0)]


⇒ cos(cos x) = [cos1,0]


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