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Middle School Classroom Math • Re: Set of Products 27 Aug 2013 | 04:51 pm
Hint: what well known set is ? Statistics: Posted by AkshajK — 3 minutes ago
ΟΛΥΜΠΙΑΔΕΣ • Re: Mock test εν όψει αρχιμήδη 27 Aug 2013 | 04:50 pm
άλλες λύσεις εδώ Statistics: Posted by parmenides51 — 3 minutes ago
Geometry Proposed & Own Problems • Re: Euler line 27 Aug 2013 | 04:49 pm
Hidden Text First we show is on . concyclic. Now let meet at concyclic, and hence . Statistics: Posted by 61plus — 4 minutes ago
Games • Re: The Dark Castle [Pt. 3: Rise of the Fallen (Ch. 7:Ice Pa 27 Aug 2013 | 04:41 pm
Guys, Ur goin to an ice place what might it be a good idea to buy? Statistics: Posted by jkoj25 — 13 minutes ago
High School Pre-Olympiad (Ages 14+) • integer 27 Aug 2013 | 04:37 pm
Find the natural numbers such that Statistics: Posted by elegant — 17 minutes ago
Number Theory Unsolved Problems • Re: sequence 3 27 Aug 2013 | 04:33 pm
It is clear that Claim: Proof: Induction. Case is trivial. Assume it's true for . We'll prove the statement for . Denote , then Q.E.D Now the desired result is obvious. Statistics: Posted by odnerpm...
High School Pre-Olympiad (Ages 14+) • Re: Trigometry 27 Aug 2013 | 04:33 pm
Solution: given sec^4(p/9)+sec^4(3p/9)+sec^4(5p/9)+sec^4(7p/9) =(1/cos(p/9))^4+(1/cos(3p/9))^4+(1/cos(5p/9))^4+(1/cos(7p/9))^4 =(1/0.93)^4+(1/0.5)^4+(1/-0.17)^4+(1/-0.76)^4 =1120 Statistics: Posted b...
Calculus Computations and Tutorials • Re: Find all integrable function such that... 27 Aug 2013 | 04:29 pm
Just iterate the formula a few times and see if the resulting sums remind you of anything . Statistics: Posted by fedja — 25 minutes ago
High School Basics (Ages 12-16) • circle 27 Aug 2013 | 04:19 pm
is a circle O. A right angled triangle ABC with BC=3 CA=4 is inscribed in O in such a way hypotenuse AB always forms a chord of O. Find the locus of vertex C. Statistics: Posted by pratyush — 34 minu...
High School Pre-Olympiad (Ages 14+) • Re: Trigometry 27 Aug 2013 | 03:57 pm
http://www.artofproblemsolving.com/Foru ... 1&t=549501 Statistics: Posted by Talisman — 56 minutes ago
