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If `f(x)=cos[pi^2]x+cos[-pi^2]x`then the value of `f(pi/4)+f(pi/2)`is

A

`1/sqrt2`

B

`1+1/sqrt2`

C

`1-1/sqrt2`

D

`-1+1/sqrt2`

Text Solution

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The correct Answer is:
D
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PATHFINDER-FUNCTION-QUESTION BANK
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  2. Let x in R be any real number such that xlies between any two consecut...

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