The point P is on the unit circle. If the y-coordinate of P is -46, and P is in quadrant III , then what does x equal?

Question

anonymous · Answer

(-4/6)

anonymous · Answer

if the point is on the unit circle then

|dw:1358985514434:dw|

x^2 + y^2 = 1

anonymous · Answer

you are given y = -4/6.  just need to solve for x

anonymous · Answer

then make sure you identify what sign x will have in the context of this problem.  for x to be a coordinate in quadrant III, the sign of x will have to be negative.

anonymous · Answer

I got -.754 which would round off to .75, did I do it correctly?

anonymous · Answer

.745 , sorry!

anonymous · Answer

yes when rounded -0.745 is approximately what the x coordinate is

anonymous · Answer

Thanks a lot! I was over thinking what I had to do.

anonymous · Answer

you did great !