Question

I need help and please write out the answer​

Answer 1

Answer:

$cos^{-1}$ (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, $cos^{-1}$.

Your calculator should have $cos^{-1}$ (

So type 2/9 in the parentheses because $\frac{2}{9}$ is the same as 2 divided by 9.

So it should be $cos^{-1}$ (2/9) in your calculator. Press enter and you should have 77.16041161.

Here are some scientific calculators and where to find their buttons:

Answer 2

Answer

Cos inverse of ( 2/9) is equal to 77.1604