Answer:
D. No function.
Step-by-step explanation:
If you represent the problem in a diagram, you will form a triangle with 3 known length of the sides. When you are given all sides, and you are asked to find an angle, you can use the cosine law.
b^2 = a^2 + c^2 - 2ac*cosB
1.4^2 = 1.9^2 + 1^2 - 2(1.9*1)(cosB)
B = 45.78°
I believe it would be any number that is within the darkest shaded area. (-4,1) seems like it would be correct.
Answer:
b, c, d and f since they have a sign of greater> or less to> or greater and less to
