-1 or option c is correct. Use the given functions to set up and simplify f(−2).
To find x we can use that fact that x is in the adjacent side of the 22° angle. We also know that 11 is our hypotenuse. Now, we can use trigonometry to find x.
cos(Ф)=adjacent/hypotenuse
cos(22°)=x/11
11 · cos(22°)= x/11 · 11 multiplicative inverse
11 cos (22°)=x
10.2≈x
C. Circle graph
Hope this was any help
