Amlan Da,
Can you tell me where to get laws of trigonometry like this?
Search found 92 matches
- Sun Dec 18, 2011 1:53 pm
- Forum: Divisional Math Olympiad
- Topic: Jessore 2007 HS prob 6
- Replies: 11
- Views: 7296
- Sun Dec 18, 2011 1:23 pm
- Forum: Divisional Math Olympiad
- Topic: Jessore 2007 HS prob 6
- Replies: 11
- Views: 7296
Re: Jessore 2007 HS prob 6
Amlan Da,
Thank you,. I think there it should be $a^2+2$ instead of $a^2+1$. I was stuck there, when i later realised this..
Thank you,. I think there it should be $a^2+2$ instead of $a^2+1$. I was stuck there, when i later realised this..
- Sun Dec 18, 2011 10:51 am
- Forum: Divisional Math Olympiad
- Topic: AGE... (Again!)
- Replies: 1
- Views: 2065
AGE... (Again!)
Shokal and Shishir were talking about their ages. Shokal said, "My age is the root of a polynimial". After seeing the polynomial $P(n)$, Shishir told, "Your Age is $7$ years". Then again Shishir told"Oh, I have made a mistake. Actually $P(7)$=77." Shokal told, "Yes, My age is much more than that". S...
- Sun Dec 18, 2011 10:32 am
- Forum: Divisional Math Olympiad
- Topic: Jessore 2007 HS prob 6
- Replies: 11
- Views: 7296
Re: Jessore 2007 HS prob 6
$\angle APB = tan^{-1} (\frac{2}{a} ) - tan^{-1} (\frac{1}{a} ) =tan^{-1} \frac{\frac{2}{a}-\frac{1}{a}}{1+ \frac{2}{a^2}} = tan^{-1} \frac{a}{a^2+1}$ as, $\angle APB$ সূক্ষ্মকোণ(ইংলিশটা ভুলে গেছি), $\angle APB$ will be maximum if $\frac{a}{a^2+1}$ is maximum. now, by differntiating $tan^-1 \frac{a...
- Sun Dec 18, 2011 10:19 am
- Forum: Divisional Math Olympiad
- Topic: Candles....(From CMC test)
- Replies: 19
- Views: 10657
Re: Candles....(From CMC test)
Labib, Please tell me where I m getting u wrong: Let me denote the total number of hours that each candle was lit for after $n$ days as $K$. And let the candle which was not lit on the $(n-1)$ is Candle A. On the $(n-2)$ day, We have 2 cases: 1. Candle A was lit: In this case, On the $(n-3)$ day, Ca...
- Sat Dec 17, 2011 11:05 pm
- Forum: Divisional Math Olympiad
- Topic: Candles....(From CMC test)
- Replies: 19
- Views: 10657
Re: Candles....(From CMC test)
Tiham, Lets see the case when n=3. The 3 candles are A,B and C. Now. We know on the first day 1 candle was lit, candle A, therefore, After day 1, Candle A was lit for 1 hour and the candle B,C for 0 hours, Now let on day 2, candles B and C were lit, each for 2 hours. So after day 2 in total, Candle ...
- Sat Dec 17, 2011 8:56 pm
- Forum: Divisional Math Olympiad
- Topic: Candles....(From CMC test)
- Replies: 19
- Views: 10657
Re: Candles....(From CMC test)
Confused, i meant on day 2, 2 candles were lit each for 2 hrs.. and so on
- Sat Dec 17, 2011 5:09 pm
- Forum: Divisional Math Olympiad
- Topic: Candles....(From CMC test)
- Replies: 19
- Views: 10657
Candles....(From CMC test)
Noushin has $n$ candles. On the first day she lights 1 candle for 1 hour, on the second day she lights 2 candles for 2 hours.... Like this on the n-th day she lights $n$ candles for $n$ hours. The candles chosen according to one's wish. If after the n-th day all the candles had been lighted for the ...
- Sat Dec 17, 2011 5:04 pm
- Forum: Divisional Math Olympiad
- Topic: Can u Factorize?
- Replies: 9
- Views: 5480
Can u Factorize?
Factorize:
$2011^4+ 7. 2011-12$
Can everyone share techniques for Factorization?
$2011^4+ 7. 2011-12$
Can everyone share techniques for Factorization?
- Wed Dec 14, 2011 1:48 pm
- Forum: H. Secondary: Solved
- Topic: Dhaka Higher Secondary 2011/8
- Replies: 18
- Views: 21418
Re: Dhaka Higher Secondary 2011/8
Tiham, Fahim er Solution ta ki??nafistiham wrote:হায় হায়! ফাহিম ভাইয়ারও এই উত্তর আসছে । আমি কয়েকজনকে তো এভাবেই দেখালাম । কিন্তু কিভাবে হবে ? এই টপিকে তো কোথাও সমাধানটা নাই ।