22.5. You can also use a the calculator (if you're using a windows operating system) which can be found in the start menu, as well as many online versions that can be found easily via Google search if necessary. Such online calculators can also be capable of handling trigonometry data as well as other more complex mathematical problems.
0.0444
22.5
90
22.5
4
4 90
No, 90 divided by 4 is 22.5
90
360 divided by four gives 90.
22.5
0.0667
90