Question

Question #2f9ed

Answer 1

No.

Explanation:

graph{cos(x) [-10, 10, -5, 5]}
If you look at the graph of `cos(x)` you will see it's symmetrical, with the `y`-axis being the line of symmetry.

Because of this, whichever `x` value we chose will have the same outcome as the `-x` value

This means that if `cos(x)=a`, then `cos(-x)=a`

Fun fact:
graph{sin(x) [-10, 10, -5, 5]}
Your original question is true with `sin(x)`
If `sin(x)=a`, then `sin(-x)=-a`