SOLUTION: Suppose that (5/13,y) is a point in Quadrant IV lying on the unit circle. Find y. Write the exact value not a decimal approximation

Algebra ->  Trigonometry-basics -> SOLUTION: Suppose that (5/13,y) is a point in Quadrant IV lying on the unit circle. Find y. Write the exact value not a decimal approximation      Log On


   

Question 856550: Suppose that (5/13,y) is a point in Quadrant IV lying on the unit circle. Find y. Write the exact value not a decimal approximation
Answer by Fombitz(32388) About Me  (Show Source):
You can put this solution on YOUR website!
Since it's on the unit circle,
x%5E2%2By%5E2=1
%285%2F13%29%5E2%2By%5E2=1
25%2F169%2By%5E2=169%2F169
y%5E2=144%2F169
y=0+%2B-+12%2F13
Since it's in Q4, it's the negative value.
y=-12%2F13