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anonymous
 one year ago
if the point(x, sqrt 3/2) is on the unit circle, what is x
anonymous
 one year ago
if the point(x, sqrt 3/2) is on the unit circle, what is x

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jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1The point is \[\Large \left(x, \frac{\sqrt{3}}{2}\right)\] right?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Notice how that point is the form (x,y) where \[\Large y = \frac{\sqrt{3}}{2}\] Do you agree with this statement?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Now plug this y value into the unit circle equation and solve for x \[\Large x^2+y^2 = 1\] \[\Large x^2+\left( \frac{\sqrt{3}}{2}\right)^2 = 1\] \[\Large x^2+ \frac{\left(\sqrt{3}\right)^2}{2^2} = 1\] \[\Large x^2+ \frac{3}{4} = 1\] Do you see how to solve for x from here?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1how would you move the 3/4 to the other side? what must you do to both sides?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1hint: you need to undo the addition

anonymous
 one year ago
Best ResponseYou've already chosen the best response.0subtract 3/4 from each side

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1yes, that gives you \[\Large x^2+ \frac{3}{4} = 1\] \[\Large x^2+ \frac{3}{4}\color{red}{ \frac{3}{4}} = 1\color{red}{ \frac{3}{4}}\] \[\Large x^2 = 1 \frac{3}{4}\] \[\Large x^2 = \frac{4}{4} \frac{3}{4}\] \[\Large x^2 = \frac{43}{4}\] \[\Large x^2 = \frac{1}{4}\]

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1Now if \[\Large x^2 = \frac{1}{4}\] then what must x be? How would you isolate x?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1x = 1/2 is one solution what is the other?

jim_thompson5910
 one year ago
Best ResponseYou've already chosen the best response.1hint: take a number like 10 and square it to get 100. You can also square 10 to get 100 as well since (10)^2 = (10)*(10) = 100 so that's why the solutions to x^2 = 100 are x = 10 or x = 10
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