Ultimate Quant Marathon Blog For IIM CAT

Problem of the Day 3.07.09

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1. its option 4) Tan^2 A

   anup

   July 3, 2009 at 12:53 pm

   Reply
2. Sorry, it is incorrect

   Rahul

   July 3, 2009 at 1:11 pm

   Reply
3. hello bro..m in 3rd yr (engg)..
   i hv read ur blog..it is very inspiring 4 me…can u plz suggest me sumways to improve in quant…

   anup

   July 3, 2009 at 6:58 pm

   Reply
4. Practice any and every material u can get hold of.
   Follow forums. If you can come to testfunda.com, great!

   Good Luck

   Rahul

   July 3, 2009 at 7:35 pm

   Reply
5. First time here.
   Feels good to get hold of at least one problem.

   my take:

   Option (1) Cos²A

   I assumed the triangle to be equilateral which really simplified things.

   And I got the ratio of areas as 1:4 which is Cos²60

   Hence, ratio =Cos²A

   Can we assume it so, where there are really no restrictions regarding the dimensions of the traingle?

   Anish

   July 4, 2009 at 6:28 pm

   Reply
6. Correct answer is Cos^2 A

   @ Anish, you made a big assumption,
   generally we can make such assumptions when there are no restrictions given..

   only in rare cases the answers differ

   Rahul

   July 8, 2009 at 3:59 pm

   Reply
7. The trignometric representation of area of a triangle is 1/2*length of side 1*length of side 2* sine of angle formed by these 2 sides …

   We can use this for the smaller triangle and proceed to get the answer without any assumptions

   Hari

   July 20, 2009 at 3:34 pm

   Reply
8. AD = AB cos A
   AE = AC cos a

   ar(AED) = (1/2) AE X AD cos A (cos A)^2
   ——- ——————- =
   ar(ABC) (1/2) AB X AC cos A

   ananymous

   September 12, 2009 at 5:22 pm

   Reply
9. AD = AB cos A
   AE = AC cos a

   ar(AED)/ar(ABC)
   = [(1/2) AE X AD cos A ]/[(1/2) AB X AC cos A]
   = (cos A)^2

   ananymous

   September 12, 2009 at 5:24 pm

   Reply