Mark the correct alternative in the following:
If f(x) = cos (log x), then 
has the value
Now, 
Using: 
=cos(2 log x)〗 cos(2 log y)-cos(2 log x) cos(2 log y)
=0
1
Mark the correct alternative in the following:
If f(x) = cos (log x), then has the value
Now,
Using:
=cos(2 log x)〗 cos(2 log y)-cos(2 log x) cos(2 log y)
=0