Application of DerivativeMedium
Question
The number of values of x, where the function f (x) = cos x + cos (√2x) attains its maximum, is
Options
A.0
B.1
C.2
D.infinte
Solution
The maximum value of f(x) = cos x + cos (√2x) is 2 which occurs at x = 0, Also, there is no other value of x for which this value will be attained again.
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