which of the following could be points on the unit circle?

Answer:
Step-by-step explanation:
In each case, square the coordinates of the point and determine whether or not the sum of these squares is 1:
A) 4/9 + 5/9 = 9/9 YES
B) 1 + 1 = 2 NO
C) 3/4 + 1/9 Not equal to 1. NO
D) 0.64 + 0.36 = 1.00 YES
HENCE OPTION B(1,1) IS CORRECT
What is unit circle?
A unit circle is a circle with a radius of one, as defined by mathematics. The unit circle is a circle of radius 1 centered at the origin (0, 0) in the Cartesian coordinate system in the Euclidean plane, which is used frequently in trigonometry.
How to solve?
Clearly from the given options (1,1 ) will lie on the circle , Hence option b (1,1) is correct .
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