Question

if the point P(-3/5,y) lies on the unit circle and P is in the third quadrant, what does y equal?

Answer 1

eqn of a circle with radius =1 and center (0,0)is
x^2 + y^2 =1
hope this helps ?

Answer 2

not really... What does y equal?

Answer 3

y is what you have to find
x = -3/5
note that it is given it lies in 3rd quad.,,so y<0

Answer 4

Think pythagorean theorem. Draw the triangle..