Search found 25 matches

by Rabeeb
Sat Feb 23, 2013 8:48 pm
Forum: Secondary Level
Topic: Help with Combinatorics
Replies: 4
Views: 2573

Help with Combinatorics

What are consistently dominated sequences? (with sufficient examples)
by Rabeeb
Fri Feb 22, 2013 12:41 pm
Forum: Secondary Level
Topic: Some Conceptual Problems
Replies: 1
Views: 1422

Some Conceptual Problems

Anyone gotta help me with the following terms?
1) n-tuples
2) parameters
3) binary operations, groups, rings and fields
by Rabeeb
Thu Feb 07, 2013 10:04 pm
Forum: National Math Olympiad (BdMO)
Topic: BdMO National 2012: Secondary 8
Replies: 10
Views: 4949

Re: BdMO National 2012: Secondary 8

@Tahmid
How can we say that
$\angle DAE+\angle ECD=180^{\circ} \Rightarrow \angle DAE+2(\angle DAC+\angle ACD)$
$\Rightarrow 3\angle DAE=180^{\circ}$
by Rabeeb
Wed Feb 06, 2013 8:30 pm
Forum: Secondary Level
Topic: Help with BDMO Problems
Replies: 1
Views: 1544

Help with BDMO Problems

1. In triangle ABC, medians AD & CF intersect at point G. P is an arbitrary point on AC. PQ & PR are parallel to AD & CF respectively. PQ intersects BC at Q & PR intersects AB at R. If QR intersects AD at M & CF at N, then prove that area of triangle GMN is (A)/8 where (A) = area enclosed by PQ, PR,...
by Rabeeb
Wed Jan 30, 2013 11:42 am
Forum: Secondary Level
Topic: Little Trigonometry
Replies: 2
Views: 1448

Little Trigonometry

If cos 3=$\sqrt p$,
Then cos 3.cos 6.cos 12$\cdots$cos 384=?
*All angles expressed in degrees