Question

What is the smallest value of `y=cos x`?

Answer 1

`-1`

Explanation:

We know that `"the Domain of cosine"` is `RR` ,but

`"the Range of cosine"` is `[-1,1]`

i.e. `-1 <= cosx <= 1`

It is clear that ,the smallest value of `y=cosx` is: `-1`