Answer:
first one
Step-by-step explanation:
Answer: 30
You want to find the lowest number and the highest number.
For stem 8, 81 is the lowest.
For stem 11, 111 is the highest.
111 - 81 = 30
Solve for cos(t) and sin(t):
x = 2 + 3 cos(t) ⇒ cos(t) = (x - 2)/3
y = 1 - sin(t) ⇒ sin(t) = 1 - y
Recall the Pythagorean identity,
sin²(t) + cos²(t) = 1
It follows that
((x - 2)/3)² + (1 - y)² = 1
or
(x - 2)²/9 + (y - 1)² = 1
