Answer:
[tex]cos^{-1}[/tex] (2/9) = 77°
Step-by-step explanation:
In your calculator, depending on what type you have, there should be a button that says 2nd. There should also be a button that reads cos, which is cosine.
We want inverse cosine, so click 2nd then cos. This should be inverse cos, [tex]cos^{-1}[/tex].
Your calculator should have [tex]cos^{-1}[/tex] (
So type 2/9 in the parentheses because [tex]\frac{2}{9}[/tex] is the same as 2 divided by 9.
So it should be [tex]cos^{-1}[/tex] (2/9) in your calculator. Press enter and you should have 77.16041161.
Here are some scientific calculators and where to find their buttons:
