Answer:
f=3
Step-by-step explanation:
The intervals means that angle f is between the quadrant 1.
Using that, we can use this identity
[tex] \sin(x) = \cos(y) [/tex]
where x+y=90
[tex]22f - 1 + 7f + 4 = 90[/tex]
[tex]29f + 3 = 90[/tex]
[tex]29f = 87[/tex]
[tex]f = 3[/tex]
