Q. If f(x) = cos (logx) then
$f (\frac{1}{x}) f (\frac{1}{y}) - \frac{1}{2} {f (\frac{x}{y}) + f (x y)} =$

1962 211 Relations and Functions - Part 2 Report Error

A

logx

6%

B

cos (logx)

12%

C

sin (logx)

25%

D

0

56%

Solution:

Correct answer is (d) 0