Venkat R

In a Δ ABC

[(b²+c²)/bc]CosA +[(a²+b²)/ab]CosC+[(a²+c²)/ac]CosB is

(1) 2abc (2) 3abc (3) 2 (4) 3

(a) The triangle is obtuse angle (b) The triangle is Right angle. (c) The triangle is equilateral (d) The triangle sides are in the ration a : b : c = 2 : 3 : 4

The format is changed frequently. How am I to get to a question I marked as "Follow Publicly"

I don't see any options available in the home page !

In Yahoo answers reports: "Sorry something interrrupted the supply of questions - try refreshing the page "

This is happening from yesterday (31/3/2014 1400 hrs IST.)

Is this a site problem in general or my specific problem.

Earlier the option of Watched list was available, where I could save interesting questions I wanted to anwer in my free time. It is not appearing now. Is that replaced by publicly / privately followed options. What is the significance of these ?

IHow do you decide a Top contributor in Yahoo Answers ? Is it based on the number of best answers or number of questions answered ? What is the criterion?

Find the number of all onto functions from the set {1, 2, 3, ... , n} to itself.

Please just don't give the answer. I want detailed explanation as to how the answer was arrived at.

. Define a binary operation ∗ on the set {0, 1, 2, 3, 4, 5} as

a * b = a + b if a + b < 6

= a + b – 6 if a + b ≥ 6

Show that zero is the identity for this operation and each element a of the set is

Invertible with (6 – a) being the inverse of a.

Doubt : Should not 6 also be a n element of the set ? if yes or no - want explanation

Prove that x² + y² + xy ≠ 0 where x and y are integers

In a case where I feel the Best answer chosen is not correct , and would like to discuss the same or point out where it is wrong , how to do it within the guidelines.

Now and then I experience signing in problem into yahoo, though it opens alright as my home page. It keeps giving "incorrect ID or password" message every time , though I am sure I am providing the right ID and password. THe help wizard too does not help. Strangely next day or after quite some time the problem disappears.

I bought a Intel CS 630 web / portable camera in the year 2001. At that time it came with driver for WIN 98. I downloaded one driver for Win XP but it only enables me to store the photos taken in the PC. I want to use it as a web-cam. It is enough for me if the driver will work only as a webcam for this camera. Please suggest or provide a working driver for Win. XP for this use i.e.use INTEL CS 630 as a web-cam.

1. ABC is triangle and D is a point inside the triangle such that DA+DB+DC is minimum. What is the location of D and the minimum value of DA+DB+DC.

2. Again D s a point inside the Triangle and DX, DY and DZ are perpendiculars on AB, BC and CA respectively. Where is D if DX+DY+DZ is minimum and what is this minimum value of DX + DY+DZ.

I have IE version 7 running and the same version is running in my friends computer too.Where as his computer shows all the HTML 4 entities mine does not ? For instance it does not show entity for angle (∠) , right double arrow ( ⇒). It displays most of the other entities correctly. Can any one suggest what I should do? Thanks in advance

The dryness experienced is overcome using some type of lubricant/allergen (eg.; Refresh + ) immediately after the operation.

Is this required to be used over a long period ? My daughter has been advised to use it every one hour. Please give precise answer.

Assume PA M and PBN are secants to a circle from point P intersecting the circle at A ,M and B,N. I think we are required to prove angle APB is half the difference of the angle of intercepted arcs. I would like to draw a diagram but how? Please explain with proof or provide reference. Thanks a lot.