the following points all lie on the unit circle. determine each unknown value.

Question

a. (x,3/4) quadrent II

b. (-7/9, y) Quadrent III

c. (1, y)

Answer 1

For all of these, since the points are on a unit circle, you can use:

x²+y²=1

x = ±√(1-y²)

y = ±√(1-x²)

Then use the quadrant information to determine whether to use + or -.