Maledicent Posted April 26, 2012 Report Share Posted April 26, 2012 (edited) I still don't understand how to find the angles of the triangle AOP'. Can someone please help me? I figured out angle O, but now I'm stuck trying to find angle P' Edited April 26, 2012 by Maledicent Reply Link to post Share on other sites More sharing options...
SymphonyOfSouls Posted April 27, 2012 Report Share Posted April 27, 2012 I still don't understand how to find the angles of the triangle AOP'. Can someone please help me? I figured out angle O, but now I'm stuck trying to find angle P' If you're using non right-angled trig, you'll need to make use of another rule (used in nra trig) besides the cosine rule to work out P'. That's the best I can do without directly stating what you need to use! Reply Link to post Share on other sites More sharing options...
SymphonyOfSouls Posted April 27, 2012 Report Share Posted April 27, 2012 I'm completely stumped on the limitations. I have one limitation, involving what happens when r is double or more OP - there's no triangle, just a straight line, though OP' can still be calculated correctly by my general statement in this situation so I'm unsure if it's a true limitation...but it's the best I've got. Can anybody point me in the right direction? 1 Reply Link to post Share on other sites More sharing options...
bader Posted April 27, 2012 Report Share Posted April 27, 2012 Guys can anyone send me the answers please? My IA is due after tomorrow (Sunday) and i don't know how to solve it at alll !! Please, i'll be so thankful. Reply Link to post Share on other sites More sharing options...
travisjames95 Posted April 30, 2012 Report Share Posted April 30, 2012 (edited) For the first part I got the General statement: OP' = r/OPFor the SECOND part this is what I got..... Tell me if I'm wrong or if you got different answers.... cuz idk what the general statement is from this...?? how do I find it?when OP=2.....r=2A and O =60.0P=60a or OP'= 2r=3A and O = 41.4P=97.2a or OP'= 4.5this one I don't understand either...r=4A and O = 0P=180? etc.....???? Edited April 30, 2012 by travisjames95 Reply Link to post Share on other sites More sharing options...
Hakeem Posted May 3, 2012 Report Share Posted May 3, 2012 Guys what do they mean by "vary the position of P".P.S: It cant be the raduis OP beacause I already did that Reply Link to post Share on other sites More sharing options...
ibfrustratesme Posted May 6, 2012 Report Share Posted May 6, 2012 I have to hand in my IA in 13 hours and i really do not have a single clue how to work this out ! I really need help ! Reply Link to post Share on other sites More sharing options...
reallyhatesib Posted May 17, 2012 Report Share Posted May 17, 2012 Hello, I really need help in thinking of a general statement for OP'. I have done the first two task. But then when it comes to using tech, I'm blank. HELP! Reply Link to post Share on other sites More sharing options...
ILikeTurtles Posted May 19, 2012 Report Share Posted May 19, 2012 I still don't understand how to find the angles of the triangle AOP'. Can someone please help me? I figured out angle O, but now I'm stuck trying to find angle P' If you're using non right-angled trig, you'll need to make use of another rule (used in nra trig) besides the cosine rule to work out P'. That's the best I can do without directly stating what you need to use! You actually don't need to use another rule other than the cosine rule. Well I didn't . But you have to look at the different triangles you have and how they relate so that you can find the angle P' Reply Link to post Share on other sites More sharing options...
ILikeTurtles Posted May 19, 2012 Report Share Posted May 19, 2012 Description level 5 (max) in Criterion C is "The student tests the validity of the general statement by considering further examples".What exactly are 'further examples' in this case? Is it just that you solve this with similarities and trigonometric approach or is it something else? Could somebody direct me, if it's something else?I think that they want you to just take different values of OP and r and see how it affects OP'. In the question it says "Use technology to investigate other values of r and OP." So you can do so using whatever program/software you have been using. Reply Link to post Share on other sites More sharing options...
aweffingsome Posted May 25, 2012 Report Share Posted May 25, 2012 (edited) can somebody tell me how to do the technology and op' general statement part? I found the general statement for the first two parts but how do you go about the technology part? I know we have to use geogebra, atleast im using that, but what after that? Im stuck :| How is it different from the first two? cause even then we found the general statement for OP'. Nevermind that, it was just me being stupid Edited May 25, 2012 by aweffingsome Reply Link to post Share on other sites More sharing options...
Beowulf Posted May 27, 2012 Report Share Posted May 27, 2012 Dude if you're still struggling with it, I am doing it now and you just use sine cosine rule to find one angle, then you use the sine rule to find OP'.Hope I helped Reply Link to post Share on other sites More sharing options...
Beowulf Posted May 30, 2012 Report Share Posted May 30, 2012 Listen, no we never assume they are parallel, why would you say such a thing! listen, we know that AO and AP' are always equal since they are the radii of Circle (C3), using cosine rule we can find angle AOP' , since triangle AOP' is an isosceles triangle then angle AOP' is equal to angle AP'O. Using this fact we find angle OAP' , then we use angle OAP' to find the length of the side OP'!! its really simplw once you get it man! try sketching with a pencil or I advice you to use GeoGebra! (AWESOME software) 1 Reply Link to post Share on other sites More sharing options...
Beowulf Posted May 30, 2012 Report Share Posted May 30, 2012 Hey people listen, I need a way to algebraically prove (analytically) that OP'=r2/OP ...... I am sure it is possible I just cannot find the way! can anyone help?! Reply Link to post Share on other sites More sharing options...
jsm_95 Posted May 31, 2012 Report Share Posted May 31, 2012 ugh, stuck on finding scope and limitations, anybody want to offer some help?Also what technology can be used for part 3? Reply Link to post Share on other sites More sharing options...
Nana95 Posted June 1, 2012 Report Share Posted June 1, 2012 Can anybody tell me how we should take abt the aim?? are we supposed to explain it?? thanks Reply Link to post Share on other sites More sharing options...
Nana95 Posted June 1, 2012 Report Share Posted June 1, 2012 Also for those who are asking about the technology thingii,, I've the program ready Reply Link to post Share on other sites More sharing options...
jsm_95 Posted June 1, 2012 Report Share Posted June 1, 2012 Also for those who are asking about the technology thingii,, I've the program ready what program are you using? Reply Link to post Share on other sites More sharing options...
jsm_95 Posted June 3, 2012 Report Share Posted June 3, 2012 does P' need to be between points O and P, or just on the same line as OP? The IA states "The point P' is the intersection of C3 with (OP)" is the fact that OP is in brackets significant? Thanks Reply Link to post Share on other sites More sharing options...
nr1RockStar Posted June 7, 2012 Report Share Posted June 7, 2012 Hey people listen, I need a way to algebraically prove (analytically) that OP'=r2/OP ...... I am sure it is possible I just cannot find the way! can anyone help?! Use the distance formula that should help Reply Link to post Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.