Last visit was: 05 Jun 2024, 09:11 It is currently 05 Jun 2024, 09:11
Close
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.

Customized
for You

we will pick new questions that match your level based on your Timer History

Track
Your Progress

every week, we’ll send you an estimated GMAT score based on your performance

Practice
Pays

we will pick new questions that match your level based on your Timer History
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Close
Request Expert Reply
Confirm Cancel
User avatar
Intern
Intern
Joined: 23 Jun 2009
Posts: 20
Own Kudos [?]: 54 [0]
Given Kudos: 6
Send PM
User avatar
Manager
Manager
Joined: 10 Jul 2009
Posts: 75
Own Kudos [?]: 581 [0]
Given Kudos: 8
Send PM
User avatar
Intern
Intern
Joined: 22 Mar 2008
Posts: 23
Own Kudos [?]: 46 [0]
Given Kudos: 1
Send PM
VP
VP
Joined: 30 Apr 2008
Posts: 1230
Own Kudos [?]: 952 [0]
Given Kudos: 32
Location: Oklahoma City
Concentration: Life
Schools:Hard Knocks
 Q47  V42
Send PM
Re: (PLEASE SOLVE THIS PROBLEM, ANYONE!) PS Problem #5. Thx!! [#permalink]
I'm not sure how the other forum solved it, but here is another way to approach the problem.

If you look at the slope of a line and realize that because we're told the two lines are 90 degrees from each other, you know the lines are perpendicular.

so what ist he slope of a line? \(y = \frac{1}{3}x + 0\) Sure we don't need the + 0, but it helps to see all the parts there.

Now I used 1/3, but that's just a number to show the formula for a line.

If the coordinates we do know were used to determine the slope of the line, what would the equation look like?

\(y = -\frac{1}{\sqrt{3}}x + 0\)

It's a negative because the slope runs from top left to bottom right and those lines are always negative. So if we know the slope, then how would we figure what the slope is of the perpendicular line, with point {s,t}?

Invert and negate the slope. We can use the same exact numbrs because we know the line is the radius of a circle and therefore the same length. By using the same numbers, we know that it will be the same length and be the correct values for {s,t}

so inverted the slope becomes \(\frac{\sqrt{3}}{1}x\)

Now if before we had \(sqrt{3}\) on bottom, and it was the x value, and now it is on top, it will not be the x value, but the y value, which corresponds to \(t\).

Hope this helps present a different way of looking at it. Answering the question won't take nearly as long as exlaining it.

uzonwagba wrote:
In the figure above, P and O lie on the circle with center O. What is the value of s?

A) 1/2
B) 1
C) sqrt(2)
D) sqrt(3)
E) sqrt(2)/2


It comes from GMATPrep. Thanks!
User avatar
Intern
Intern
Joined: 15 Oct 2008
Posts: 4
Own Kudos [?]: [0]
Given Kudos: 0
Send PM
Re: (PLEASE SOLVE THIS PROBLEM, ANYONE!) PS Problem #5. Thx!! [#permalink]
all you need to determine is that a 30-60-90 triangle can be fitted with OQ as hypotenuse
VP
VP
Joined: 30 Apr 2008
Posts: 1230
Own Kudos [?]: 952 [0]
Given Kudos: 32
Location: Oklahoma City
Concentration: Life
Schools:Hard Knocks
 Q47  V42
Send PM
Re: (PLEASE SOLVE THIS PROBLEM, ANYONE!) PS Problem #5. Thx!! [#permalink]
what part of the picture provided lets you determine the angle measurements? I realize you can see that the readius is 2 from the numbers provided in the first point, but you still have to address how the 90 degree angle between the lines figures intot he problem.

travern wrote:
all you need to determine is that a 30-60-90 triangle can be fitted with OQ as hypotenuse




Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Problem Solving (PS) Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
GMAT Club Bot
Re: (PLEASE SOLVE THIS PROBLEM, ANYONE!) PS Problem #5. Thx!! [#permalink]
Moderators:
Math Expert
93500 posts
Senior Moderator - Masters Forum
3131 posts