How do some and cosine relate to x and y coordinates on a unit circle?

Brainlest answer can you find the area and circumference of a circle given the radius or diameter? if its yes or no explain why

F(x)=x/2-2 and g(x)=2x^2+x-3 find (f+g)(x)

14. (05.02 lc) what is the value of y in the solution to the following system of equations? (5 points) 2x + y = −4 5x + 3y = −6