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36 votes
Please help me with this math problem (:

Please help me with this math problem (:-example-1
User Alec Segal
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2 Answers

19 votes
19 votes

Answer:


{x}^(2) + ( ( √(3) )/(2) ) {}^(2) = 1 \\ {x}^(2) = (1)/(4) \\ x = (1)/(2) \: \: or( (1)/(2) ) \\ x > 0 \\ therefore \: \: x = (1)/(2)

User Roman Ganz
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2.9k points
25 votes
25 votes

Answer:


x=-(1)/(2)

Explanation:

equation of a circle:
(x - h)^2+(y-k)^2=r^2

where (h, k) = center and r = radius

From inspection, we can see that the center of the circle = (0, 0)

and the radius = 1


\implies (x - 0)^2+(y-0)^2=1^2


\implies x^2+y^2=1

Substitute
y=(√(3))/(2) into
x^2+y^2=1 and solve for
x:


\implies x^2+((√(3))/(2))^2=1


\implies x^2+(3)/(4)=1


\implies x^2=(1)/(4)


\implies x=\pm \sqrt{(1)/(4)}


\implies x=\pm(1)/(2)

As point P is in quadrant 2,
x is negative, so
x=-(1)/(2)

User Zerok
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2.5k points