How do you draw #45^circ# and #-45^circ# in standard position and then show that #cos(-45^circ)=cos45^circ#?
1 Answer
Aug 7, 2018
I tried this:
Explanation:
Have a look:
where the green segment represents the cossine.
The negative angle means that you move clockwise in describing your angles (starting from the positive half of the horizontal axis).
