If `x` is any non-zero real number, show that `costheta' a n d ' sintheta` can never equal to `x+1/x ,`

Explanation

We know, Range of `cos theta` is `-1`,
. If `cos theta = x + 1/x`,
if `x > 1` then `1/x < 1`
Ultimately ` x + 1/x` > 1
which shows, `cos theta> 1` which is not possible

similarly sin theta is also not possible