## anonymous 4 years ago If the point P lies on the unit circle, is located in Quadrant IV, and the y-coordinate is -7/25, what is the x-coordinate of the point? show work

1. amistre64

unit circle; sin and y are the same thing; so what angle has a sin of -7/25? arc sin it and find the cosine for the x value

2. anonymous

I know how to do it but I keep getting the wrong answer

3. dumbcow

|dw:1328226159309:dw| use pythagorean thm

Using pythagorean $\sqrt{1-49/625}=24/25$ Could x be that close to 1???

5. dumbcow

yep