Which of the following could be points on the unit circle?
1 answer:
Answer:
see below
Step-by-step explanation:
For a point to be on the unit circle, the sum of the squares of the point's coordinates must be 1. Each value that is a fraction will have a square that is smaller than it is.
A: the given values add to 1; the sum of their squares cannot be 1.
B: a correct choice
C: one of the given values is more than 1, so the point cannot be on the unit circle
D: a correct choice
You might be interested in
ANSWER:
4th option: y = cosine (x + pi)
STEP-BY-STEP EXPLANATION:
For the function y = cosine (x), when x = 0, y = 1 and when x = , y = -1. The graph shows the opposite, when x = 0, y = -1 and when x = , y = 1, so we must add the same amount x = , for y to be positive 1.
So the equation of the graph would be:
The correct answer is then the 4th option y = cosine (x + pi)