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The number of values of x where the func...

The number of values of `x` where the function `f(x)=cosx+cos(sqrt(2)x)` attains its maximum is 0 (b) 1 (c) 2 (d) infinite

A

0

B

`1`

C

`2`

D

infinite

Text Solution

Verified by Experts

The correct Answer is:
B
The maximum value of ` f(x) = cos x + cos ( sqrt 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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