SOLUTION: Find the missing coordinate of P, using the fact that P lies on the unit circle in the given quadrant. Coordinates Quadrant 2 P(− 2/3, ?) Pleas

Algebra ->  Trigonometry-basics -> SOLUTION: Find the missing coordinate of P, using the fact that P lies on the unit circle in the given quadrant. Coordinates Quadrant 2 P(− 2/3, ?) Pleas      Log On


   

Question 918190: Find the missing coordinate of P, using the fact that P lies on the unit circle in the given quadrant.
Coordinates Quadrant 2
P(− 2/3, ?)

Please explain
Thank you
Answer by solver91311(24713) About Me  (Show Source):
You can put this solution on YOUR website!


The coordinates of any point on a unit circle are related in either of the following fashions:



or



Which follows directly from Pythagoras. Since you are given the coordinate, use the first one. Select the sign based on the sign of the desired coordinate that is correct for the given quadrant.

John

My calculator said it, I believe it, that settles it