Answer to this question plz

Write a function that matches the description. a cosine function has a maximum of 5 and a minimum value of -5. f (r) =

What point is the projection of q on a) r b) s c) t

Me solve this problem, and someone clearly explain to me how to solve it.1.) use the value of the discriminant to determine if the given trinomials has 2 real solutions, 1 real solution, or no real solutions.a.  x2  − 4x  − 7 = 0b. 4r2  + 11r  − 3 = 0c. 3m2  + 7 = 0d.  t2  + 2t  + 1 = 0