The point P is on the unit circle. Find P(x, y) from the given information. The y-coordinate of P is 3/4 , and the x-coordinate is negative.

Answer 1

Hello Himmothy,

Because P (x,y) is on the unit circle, it obeys the formula: x² + y² =1

x² + (3/4)² = 1

x² = 1 - (3/4)²

x² = 1 - 9/16

x² = 7/16

so x = ± √(7/16)

Now, you're told the x-coordinate is negative; therefore x = -√(7/16) which means x = -square_root(7)/4

x = - square_root(7)

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